Bosch FAP-OC 500Series User manual

SERVICE MANUAL
for
500 Series
Built-in Wall Ovens
HBL5351UC HBN5451UC
HBL5451UC HBN5651UC
HBL5551UC
HBL5651UC
HBL57M52UCC*
This manual contains information that is necessaryfor
servicing the following Boschelectric built-in wall ovens:
HBL5351UC, HBL5451UC, HBL5551UC, HBL5651UC,
HBL57M52UCC*
HBN5451UC, HBN5651UC
This manual is designed to be used by qualified service
personnel only. Due to the complexity and the risk of
high-voltage electrical shock,Boschdoes not recommend
that customers servicetheirown units.
This material is intended for the sole use of BSH
authorized persons and may contain confidential and
proprietary information. Any unauthorized review, use,
copying, disclosure,or distribution in any format is
prohibited.
*HBL57M52UCCis thetraditionalwalloven componentofthe
HBL57M52UCcombinationoven(set),whichalso includes the
HMB50152UC Solomicrowave oven.

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Copyright by BSH Home Appliances Corporation 1901 Main St ▪Suite 600 ▪Irvine, CA 92614 800 944-2904
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TABLE OFCONTENTS
1Symbols Used in this Manual..................................................... 3
2IMPORTANT SAFETY INFORMATION....................................... 4
2.1 Safety Before Servicing the Appliance..................................4
3General.......................................................................................... 6
3.1 Recap of Functional/Technical Changes............................... 6
3.2 Models.................................................................................... 6
3.2.1 Combination Ovens (Sets)..............................................7
3.3 Rating Label ........................................................................... 7
3.4 Warranty.................................................................................8
4Operation...................................................................................... 8
4.1 Allowable Operating Range by Cooking Mode......................8
4.2 Heating Elements...................................................................8
4.2.1 Elements Used by Cooking Mode..................................8
4.2.2 Element Duty Cycles.......................................................9
4.2.3 Setting Temperature Offsets.........................................10
4.3 Self-clean.............................................................................. 11
4.4 Cooling Fan..........................................................................11
5Component Accessibility.......................................................... 11
5.1Serviceable from Front.........................................................11
5.2 Serviceable from Side.......................................................... 11
5.3 Serviceable from Rear .........................................................11
5.4Serviceable from Top...........................................................12
6Service and Repair.................................................................... 13
6.1 Doors....................................................................................13
6.1.1 Removing and Reinstalling the Door............................ 13
6.1.2 Replacing Hinges.......................................................... 14
6.1.3 Replacing the 2-Pane Glass Pack................................15
6.2 Door Latch/Motor Assembly.................................................16
6.2.1 Replacing the Latch/Motor Assembly........................... 16
6.3 Oven High Temperature Cutout (HTC)................................ 17
6.3.1 Resetting and Replacing the HTC................................17
6.4 Control Panel........................................................................18
6.4.1 Replacing the Front Panel Assembly...........................19
6.4.2 Replacing the Display Module......................................19
6.4.3 Replacing the Rotary Switches.....................................20
6.5 Cavity Lights......................................................................... 20
6.5.1 Replacing the Lamp...................................................... 20
6.6 Convection Fan, Ring Element and Motor........................... 21
6.6.1 Replacing the Convection Fan Blade ...........................21
6.6.2 Replacing the Convection Element..............................21
6.6.3 Replacing the Convection Fan Motor ...........................22
6.7 Broil Element........................................................................22
6.7.1 Replacing the Broil Element .........................................22
6.8 Bake Element.......................................................................23
6.8.1 Replacing the Bake Element ........................................23
6.9 Temperature Sensor............................................................ 23
6.10 Control Module (Relay Board) and Daughter Board ...........23
6.10.1 Combination Oven........................................................24
6.10.2 Replacing the Control Module or Daughter Board....... 24
6.11 Cooling Fan.......................................................................... 25
6.11.1 Replacing the Cooling Fan ........................................... 25
6.12 Hinge Receivers................................................................... 26
6.12.1 Replacing the Hinge Receivers ....................................26
7Troubleshooting........................................................................ 27
7.1 Error Codes..........................................................................27
7.2 Service Mode .......................................................................31
7.2.1 Accessing Service Mode: Single Ovens.......................31
7.2.2 Accessing Service Mode: Double Ovens ..................... 31
7.2.3 Setting the Option Code ...............................................32
7.2.4 Displaying Error Memory.............................................. 33
7.2.5 Testing Relays ..............................................................33
7.2.6 Testing Front Panel.......................................................33
7.3 Fault Trees ........................................................................... 34
7.4 Diagnostics........................................................................... 38
7.4.1 Rotary Encoders............................................................... 38
7.5 Wiring Diagrams and Schematics........................................39
7.5.1 Wire Color Key..............................................................39
7.5.2 Strip Diagrams.............................................................. 39
8Additional References............................................................... 40
8.1 QuickFinder.......................................................................... 40
8.2 Technical Support ................................................................41

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Copyright by BSH Home Appliances Corporation 1901 Main St ▪Suite 600 ▪Irvine, CA 92614 800 944-2904
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1 SYMBOLS USED IN THIS MANUAL
WARNING –this symbol alerts you to dangers that may
result in bodily injury or death
CAUTION –this symbol alerts you to actions that may
result in damage to the product or property

NOTICE –this symbolalerts you to important
information and/or service tips.
VIDEO –related servicevideo available for viewing on
QuickFinder
!
!

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Copyright by BSH Home Appliances Corporation 1901 Main St ▪Suite 600 ▪Irvine, CA 92614 800 944-2904
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2 IMPORTANT SAFETY INFORMATION
Before starting to servicean appliance, familiarize yourself with all
safety information and precautions included in this manual.
2.1 Safety Before Servicing the Appliance
WARNING
Before disassembly, removal, or installation of any
component…
Turn off electrical power by removing the power cord from
the electrical outlet or putting the circuit breaker in the OFF
position.
Be sure the entire appliance has cooled to a safe
temperature.
!
WARNING
Use of replacement parts…
Use only authorized replacement parts for this appliance. Use of
unauthorized substitutions may cause non-compliance with safety
standards set for home appliances, will void the warranty, and may
create safety hazards resulting in damage, bodily injury, or death.
!
WARNING
Electrical hazards…
Before servicing the appliance, remove electrical power by
either disconnecting the power cord from the wall receptacle
or by putting the circuit breaker in the OFF position.
If tests must be conducted while the appliance is live, always
use a residual-current-operated circuit breaker. The
protective conductor connection must not exceed the
recommended values.
When repairs are complete, perform a function test in
accordance with the appropriate regulations.

Do not, under any circumstances, cut or remove the separate
ground wire or the third (ground) prong from the power cord
plug.
Improper grounding or reverse polarization will cause
malfunction, which can damage the appliance and create an
electrical shock hazard. Make sure the circuit is properly
grounded and polarized in accordance with applicable local
codes and ordinances. Receptacle replacement shall be in
accordance with the National Electric Code.
!
WARNING
Sharp components…
This appliance has sheet metal parts and components which may
have sharp edges. Avoid injury by handling parts with care and using
adequate protective measures, such as wearing gloves.
!

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Copyright by BSH Home Appliances Corporation 1901 Main St ▪Suite 600 ▪Irvine, CA 92614 800 944-2904
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WARNING
Clean-up hazards…
Do not allow any cleaning or polishing solutions/compounds,
disinfectants, or bleaches to remain in contact with the stainless steel
surfaces for long periods, or after clean-up. These may contain
chemicals or materials which could release harmful inhalants and
may cause damage to the appliance. After cleaning or polishing,
always rinse the cleaning/polishing materials with clear water and
wipe dry with a clean, soft, non-abrasive cloth.
!
WARNING
Prior to returning appliance to service, confirm that…
All electrical connections are correct and secure
All safety grounds (internal and external) are correctly and
securely connected
All panels and components are properly and securely
reassembled.
!

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Copyright by BSH Home Appliances Corporation 1901 Main St ▪Suite 600 ▪Irvine, CA 92614 800 944-2904
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Figure 1 Model number nomenclature
H B L 5 4 5 1 U C
CLASS
HB=built-inoven
HS=built-insteam oven
SIZE
L=30”
N=27”
SERIES
5=500
8= 800
P=Benchmark
CAVITY TYPE
3=Single:
thermal
4=Single:
EU convec
5=Double:
thermal/thermal
6=Double:
EU convec/thermal
or EUconvecboth
COLOR
5=SS
6=Blk
VARIANT
1=2014 launch
2=2016 launch
COUNTRY
UC = US/Canada
3 GENERAL
The 500 Series includes five HBL5x (30") and two HBN5x (27") built-
in wall ovens. Models have thermal oven cavities and/or Euro-
convection (convection with ring element) cavities. The lineup
includes a field-assembled combination model with a 120V
HMB50152UC microwaveoven component.
All models are stainless and have heavy-duty metalknobs for
selecting the cooking mode and temperature, as well as white LED
displays. The wall ovens are designed to be installed flush with
cabinetry.
The control panel and door skins on the stainless models are madeof
grade 439 stainless steel, which is magnetic.
3.1 Recap of Functional/Technical Changes
Cooling fan: now operates with a variable speed protocol.
Hall effect sensor has been eliminated, and thermal limiter
(HTC) has been added.
Power supply: now located on the control module (relay
board) rather than as a separate component.
User interface:nolonger separate user interface software;
the control module drives the user interface. LED-based
display with capacitive touch panel managed by a separate
touch control module (TCM).
Daughter board (double ovens only): populated with relays to
operate the lower oven.
Ventilation: air flows up through each door, then back out
over each door as air exits the appliance; someair is pulled
into the unit at the lower vent area under the appliance.
Lighting: Soft lighting is standard on all models. Double oven
lighting is not independent; lights operate concurrently.
Temperature control:now a two-point control for all modes
rather than a PID control for all modes.
3.2 Models
The model number structureappears below.
HBN5451UC 27” Single oven with Euro-convection
HBN5651UC 27” Double oven with Euro-convection/thermal
HBL5351UC 30” Single oven with thermal
HBL5451UC 30” Single oven with Euro-convection
HBL5551UC 30” Double oven with thermal/thermal
HBL5651UC 30” Double oven with Euro-convection/thermal
HBL57M52UCC* 30” Single combo-ready oven with Euro-
convection
*(The HBL57M52UCCis thetraditionaloven componentofthe HBL57M52UC
combination oven(set).

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Copyright by BSH Home Appliances Corporation 1901 Main St ▪Suite 600 ▪Irvine, CA 92614 800 944-2904
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Figure 4 Rating label location
3.2.1 Combination Ovens(Sets)
The 2016 combination ovens (sets) are shipped together as individual
components (Figure 2), and are assembled at the customer’s home
during installation.
Figure 2 Components as-shipped
Although the combination ovensare sold using the combination
model SKU, the service documentation for the sets can be found
linked to the component models rather than the combination
model SKU.For example, the 500 series combination is sold as
HBL57M52UC, but the servicedocumentation canbe found in
QuickFinder,linked to its components:HBL57M52UCC (traditional
wall oven) and HMB50152UC (microwave).There is no service
documentation linked to HBL57M52UC, but a cross-referencewill
appear in QuickFinderwhen HBL57M52UC is entered.
Figure 3 Combination documentation
3.3 Rating Label
The rating label reflecting model number and FD number is located on
the side trim.
The first 4 positions of the FD number reflect the year/month the
product was built. FD numbers that begin with 96 were built in 2016;
97 = 2017; 98 = 2018, etc. An FD of 9611 indicates the oven was built
in November 2016.
Note: Some traditional ovens manufactured between April and
October2016 shipped with numeric model numbers only
If model number on
Rating Label is…
QuickFinder
documents and
manuals are found at
Product description
9001227720/01
HBL57M52UCC/01
500 Series
traditional oven
NOTICE
Be prepared to provide the complete Model Number and FD number
printed on the Rating Label of the unit when contacting Bosch Customer
Support or Technical Support for assistance.

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Copyright by BSH Home Appliances Corporation 1901 Main St ▪Suite 600 ▪Irvine, CA 92614 800 944-2904
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3.4 Warranty
The product is warranted to be free from defects in materials and
workmanship for a period of 365 days from date of purchase.
Boschwill have no responsibility or liability for repairs or work
performed by a non-authorized servicer.
Find the complete Statementof Limited ProductWarranty in the
product’s Use and Care Manual.
4 OPERATION
This sectionincludes basic information about how the 500 Series wall
ovens operate.
4.1 Allowable Operating Range by Cooking Mode
Table 1 reflects the minimums andmaximums by cooking modefor
each model in the 500 Series.
Cooking Mode
Models
Min
Max
Default
Bake
All
100°F
550°F
350°F
Broil (Low 450°F /
High 550°F)
450°F
550°F
High
Roast
100°F
550°F
325°F
Warm
140°F
225°F
170°F
Sabbath
100°F
425°F
N/A
Self-Clean
2 hours
4 hours
3 hours
Proof Dough
85°F
125°F
100°F
Convection Bake
HBL5451UC
HBN5451UC
HBL5651UC
(upper)
HBN5651UC
(upper)
HBL57M52UCC
100°F
550°F
325°F
Convection Broil
450°F
550°F
High
Convection Roast
100°F
550°F
325°F
Pizza
100°F
550°F
400°F
Multi-Rack
Convection
(Eur. Conv.)
100°F
550°F
325°F
Convection
Conversion
N/A
N/A
Auto Temp
Reduction by
25°F
4.2 Heating Elements
All ovens include an 8-pass 3800W broil element and a 4-pass
2400W bake element. Models with Euro-convection include a 2000W
ring element as well.
Whenthe door is opened, all heating elements (and the convection
fan, if applicable) will be paused. When the door is closed, cycling will
continue.
4.2.1 ElementsUsedby Cooking Mode
The table below reflects the elementswhich are used for each
cooking mode.
Cooking Mode
Elements Used
Description
Bake
Broil, Bake
Upper and lower elements cycleto
maintain oven temperature
Broil
Broil
Intense heat is radiated from the upper
element
Roast
Broil, Bake
Upper and lower elements cycleto
maintain oven temperature; more
intense heat from the upper element is
used than the lower.
Warm
Broil, Bake
Upper and lower elements cycleto
maintain a low oven temperature
Proof Dough
Bake
Lower element is used to maintain a low
temperature
Table 1 Allowable range by cooking mode

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Cooking Mode
Elements Used
Description
Self-clean
Broil, Bake
Upper and lower elements cycleto
maintain oven temperature; more
intense heat from the upper element is
used than the lower.
Convection Bake
Broil, Bake,
Conv Fan
Upper and lower elements cycleto
maintain oven temperature, and the
heat is circulated by the convection fan
Convection Broil
Broil, Conv Fan
Intense heat is radiated from the upper
element and the convection fan
circulates the air
Convection Roast
Broil, Bake,
Conv Fan
Upper and lower elements cycleto
maintain oven temperature and air is
circulated by the convection fan; more
intense heat from the upper element is
used than the lower.
Convection Multi-
rack
Conv Element,
Conv Fan
Heat is generated by the convection ring
element and circulated by the
convection fan.
Pizza
Broil, Bake,
Conv Fan
Upper and lower elements cycleto
maintain oven temperature, and the
heat is circulated by the convection fan
4.2.2 Element Duty Cycles
A two-point control is used for all cooking modes.Element duty cycles
for Preheat, FastPreheat, and Regulate can be found in the tables
that follow.
Table 2 Activ e elements by cooking mode
Table 3 Element duty cycles during Preheat

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4.2.3 SettingTemperature Offsets
In somecases,it may be necessaryto adjust the oven temperature if
the customerreports that food is consistentlyunder- or over-cooked,
even though the oven is operating normally. Temperature Offsetscan
be entered by the customerfrom the CustomerSettings menu to raise
or lower the cavity temperature during operation in modes other than
Broil, Convection Broil, Warm,PizzaorSelf-clean.
The allowable Offsetrange is from 0°F to 35°F, positive or negative.
1. Access the CustomerSettings Menu (from stand-by mode
only)
Single Ovens:Press Clock and +for 3 seconds
Double Ovens:Press Upper Oven and Timer
2. Press Clock to move through the menuuntil the Offset menu
option is displayed.…
Non-convectionSingle Ovens:S5
Non-convectionDouble Ovens:S5 (upper) / S6 (lower)
Convection Single Ovens:S6
Convection Double Ovens:S6 (upper) / S7 (lower)
3. Press + or –to change the setting value; holding either button
for more than 1 secondwill increment/decrementthe value by
1 degree every 500 ms until the upper/lower limit is reached.
4. Press Clock to save the value.
5. Press Clear or turn one of the switches to exit the menu
Example: A +25° offset will result in a cavity temperature of 350°
when the cooking temperature is set to 325° for any of the cooking
modes affected by the Offset. Similarly, a -25° offset will result in a
NOTICE
When the Temperature Offset menu selection is reached, the current
offset value will not be displayed.
Table 4 Element duty cycles during Fast Preheat
Table 5 Element duty cycles during Regulate

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cavity temperature of 300° when the cooking temperature is setto
325°.
The adjusted temperature cannot be less than the minimum allowable
temperature for the cooking mode,nor higher than the maximum for
the cooking mode. See Allowable Operating Range by Cooking Mode
section.
4.3 Self-clean
In a double oven, if Self-clean is running in one cavity, the second
cavity will be disabled until the cyclefinishes.
4.4 Cooling Fan
The cooling fan is used to maintain allowable temperatures on internal
components and customer-accessiblesurfaces.
During Preheat, the fan speed will increase based on cavity
temperature until the final speed is reached at the conclusion of
Preheat. Throughout the Regulate phase of the cooking cycle, the fan
speed will remainconstant.
During Self-clean, the cooling fan will run at high speed immediately
after the self-clean cyclebegins, regardless of temperature. The fan
will remain at this speed for the entire self-clean cycle.
Whenany of the following errors occur,the cooling fan will operate at
100% until the error is cleared: E101/E201, E002/E302, E303,
E104/E204. See the Error Code Table for more information about
these error codes.
The cooling fan will run until the cavity temperature is cooler than
491°F (255°C). Oncethat temperature is reached, the fan will run for
an additional 15 minutes,even if the oven is off. If the cavity
temperature never exceeded 491°F (255°C) during operation, the fan
would not have run at all.
5 COMPONENT ACCESSIBILITY
5.1 Serviceable from Front
Front panel (service assemblyincludes skin, touch pad, touch
control module (TCM))
Display module
Switches
Door
Door latch/motor assembly
Resettable High Temperature Cutout (HTC) *
Convection fan blade
Convection ring element **
Temperature sensor
Smoke eliminator (catalyst)
Broil reflector and element **
* If it is not possible to service the resettable HTC through the latch plate
opening, see the Resetting and Replacing the HTC section.
**If the broil or convection ring element wires are too short to service from
the front, access tothe rear of the oven will be required.
5.2 Serviceable from Side
Withthe unit pulled completely out of the cutout and the side housing
panel(s) and trim removed, the hinge receivers can be serviced.
5.3 Serviceable from Rear
Withthe unit pulled completely out of the cutout and the back housing
panel(s) removed, the following components can be serviced from the
rear…

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Convection fan motor
Convection ring element *
Broil element *
Bake element
Cooling fan
Cavity lamp receptacle(s)
* If the broil or convection ring element wires are too short to service from the
front, access to the rear of the oven will be required.
5.4 Serviceable from Top
There is limited access tothe top front plenum area after sliding the
oven out of the cutout ~10” and removing the access panel on the top
front housing cover.
For unrestricted access tothe front plenum area, slide the oven out of
the cutout approximately ~16” and remove the top front housing cover
completely.
The components below are located in the front area of the top
plenum…
Control module (relay board)
Daughter board (double ovens only)
Terminal block
120VAC receptacle harness and fuse (HBL57M52UCC only)
CAUTION
When servicing the standard wall oven component of an
HBL57M52UC combination oven, the microwave oven must be
removed in order to access the top plenum area of the
HBL57M52UCC wall oven. To safely remove and reinstall the
microwave, two people are required.
Figure 5 120VAC receptacle and harness (HBL57M52UCC only)
NOTICE
The 120VAC receptacle snaps into the rear housing cover.
Gain access to the receptacle’s electrical fuse and wiring termination
by removing the top front cover.

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6 SERVICE AND REPAIR
6.1 Doors
The serviceable parts of the door assemblyinclude the handle,
endcaps, outer door glass/skin(service assembly),twospring hinges,
2-pane glass pack, porcelain-coated door liner, and the various
fasteners.
On double ovens, the Boschlogo is located on the upper oven door
skin.
6.1.1 Removingand Reinstallingthe Door
To remove the door…
1. Open door completely.
2. Flip right and left hinge levers back to open, as shownbelow;
be sure the levers are in the fully open position.
3. Partially close the oven door until it is open about 7”; you will
feel the door catchon the hinge-stop levers.
4. Using both hands, lift door upward and outward to disengage
the hinges from the hinge receiver slots.
5. Set the door aside on a protected flat surface.
To reinstall the door…
1. Hold the door firmly in both hands and position the hinges in
the hinge receivers, so that the slot in the base of the hinge (A)
engages with the hinge receiver (B).
CAUTION
Avoid injury when removing and replacing oven doors.
Be sure oven is cool enough for handling.
Position hinges properly (see Figure 6).
Grasp only by sides, not by the handle.
Do not force door open or closed.
Handle with care–the door weighs approximately 40 lb.
CAUTION
Sheet metal parts often have sharp edges. Avoid injury by
handling these parts with care.

Turn off the electrical power circuit to the oven at the main junction
box before servicing this unit.
For those checks requiring the use of electrical power, exercise
extreme care.
NOTICE
It may be necessary to use a tool, such as a screwdriver, to gently
pry the upper part of the lever away from the housing. Take care to
avoid scratching the porcelain.
Figure 6 Opening the hinge lever

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2. Tilt the door inward and slide the hinges into place; the hinges
should catchand the door should remain in place.
3. Open door fully to expose the hinge levers and hinge receiver
slots.
4. Flip the right and left hinge levers forward until they are fully
closed.
5. Open and closethe door carefully to confirm that the door is
installed correctlyand securely, and does not appear to be
askew when closed.
6. Close and open door to checkoperation.
6.1.2 ReplacingHinges
The doors on Bosch500 series ovens operate using two spring
hinges. Hinges are offered in servicekits which include both the RH
and LHhinges; always replace them in pairs.
To access the hinges…
1. Remove the door as described in the Removingand
Reinstalling the Door section.
2. Withthe porcelain-coated door liner up, remove the two
screws oneach side of the door liner.
3. Remove the screws along the bottom of the door assembly.
4. Lift the liner away from the rest of the door assemblyand set
aside.
5. Remove the screws at the top left and top right which secure
the handle to the door assembly.
6. Carefully lift the inner support frame with glass pack and
hinges away from the outer door glass/skinassemblyand lay
flat on the work surface.
Figure 8 Closing hinge lever
Figure 7 Position the hinge in the hinge slot
Figure 9 Removing door liner screws
Figure 10 Removing inner support frame assembly

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7. Lift the two pieces of insulation off the inner support frame
assemblyand setaside.
8. Remove the screws onthe lower right and lower left which
securethe hinges to the inner support frame.
9. Lift the inner support frameupwards to access the hinges.
10. Install new right and left hinges and reassemblethe door.
11. Test operation of the door by fully opening and closingit
several times.
6.1.3 Replacingthe 2-Pane Glass Pack
To access theglass pack…
1. Remove the door as described in the Removingand
Reinstalling the Door section.
2. Withthe porcelain-coated door liner up, remove the two
screws oneach side of the door liner.
3. Remove the screws along the bottom of the door assembly.
4. Lift the liner away from the rest of the door assemblyand set
aside.
5. Remove the screws atthe top left and top right which secure
the handle to the door assembly.
6. Carefully lift the inner support frame with glass pack and
hinges away from the outer door glass/skinassemblyand lay
flat on the work surface.
7. Lift the two pieces of insulation off the inner support frame
assemblyand setaside.
8. Remove the screws securingthe right and left side door
shields and set shields aside.
9. Carefully lift the glass pack out of the inner support frame.
Figure 11 Location of screws securing handle and hinges to inner support frame assembly
Figure 12 Removing door liner screws
CAUTION
Wear protective gloves when disassembling the door. When replacing the
glass pack due to broken glass, exercise extra care to avoid injury from
broken glass.
Figure 13 Removing inner support frame assembly

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10. After removing and discarding all remnants of broken glass,
install the new glass pack assembly and reassemblethe door.
11. Test operation of the door by fully opening and closingit
several times.
6.2 Door Latch/Motor Assembly
The motorized door latch (MDL) mechanism (120VAC 60Hz 4.3W)
has 2 switches -the door switchand the lock/unlock switch.The latch
will automatically lock when mode and temperature selectors are set
to Self Clean, and unlock when the oven cools to ~490°F. The latch
and motorare serviced as an assembly.
If the latch becomes stuckin the locked position, turning the unit off
and back on will open the latch if the cavity temperature <491°F. If
latch is stuckin a partially locked position, turn the modeand
temperature selectors to Self Clean, then turn them to Off.
If these measures fail, run a thin wire or wire coat hanger in between
the door and the front face of the oven. Figure 16 shows where to
position the wire between the latch hook (1) and the plunger (2). Slide
the wire to the left, pushing the latch hook left and releasing the latch.
There is a Door Lock Relay Testavailable in Service mode. See the
ServiceMode sectionfor details.
6.2.1 Replacingthe Latch/Motor Assembly
1. Remove power to the oven.
2. Remove the inner screws securingthe latch to the latch plate,
then remove the outer screws securingthelatch plate to the
oven.
Figure 15 Ov en door latch
Figure 17 Front latch plate; remove/replace screws in order shown
Figure 14 Removing 2-pane glass pack
1
2
3
1 Door side shield
2 Inner supportframe
3 Two-pane glass pack
Figure 16 Latch in locked position
1
2

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Figure 19 HTC and mounting bracket
Figure 18 Door latch/motor assembly and rear support bracket
3. Hold the latch hook and slide the latch assemblyback and a
little to the left to disengage it from the smallsupport bracket
that sits directly behind it, then pull the latch forward.
4. Disconnectthe wires.
5. Install the new latch/motor assembly,reconnecting the wires
and engaging the latch correctlywith the latch support bracket.
6. Position the latch plate with the curved corners at the bottom,
and reinsert screws.
7. Restorepower and test operation.
6.3 Oven High Temperature Cutout (HTC)
The resettable HTC is a normally closed12VDC thermal switchthat is
used to detect over-temperature conditions within the oven. It has a
connector that will interrupt the double line break (DLB)relay coil
voltage supply if the temperature reaches 185°C/365°F. Whenthe
HTC switchopens, it breaks the line to the double line break (DLB)
relays, cutting off power to the elements.
Withthe latch plate removed, the HTC and the bracket it’s mounted
on are visible to the left of the door latch/motor assembly.Figure 19
shows the HTC and bracket, but note that this view is looking from the
rear of the oven towards the front, beneath the top plenum.
6.3.1 Resetting andReplacingthe HTC
Always troubleshoot a tripped HTC to determine the underlying cause
of the interruption.
To reset the HTC…
1. Remove power to the oven.
2. insert a flat blade screwdriver through one of the vent slots,
and depress the red resetbutton.
3. Restorepower and test operation.
To remove the HTC from the front, a right-angled screwdriverwill be
needed….*
1. Remove power to the oven.
NOTICE
The HTC switch should only be reset once or twice before being
replaced. The switch weakens each time it trips, so it will become
easier and easier for the switch to trip during high-temperature cycles
(i.e., Self-clean) if it has weakened over time.

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Figure 20 Accessing the latch/HTC on the top insulation retainer
2. First remove the latch plate and remove or slide the
latch/motor assemblyaside as described in the Replacing the
Latch/Motor Assembly section.
3. Using a right-angled screwdriver, remove the two screws
securing the HTC to its mounting bracket.
4. Disconnectthe wires and remove the HTC.
5. Install the new HTC.
6. Reinstall or reposition the latch motorassembly.
7. Restorepower and test operation.
* If it is not possible to replace the HTC from the front, slide the oven
completely out of the cutout, remove the top housing covers, remove the
front panel, then remove all of the parts identified with a  below to reach the
top insulation retainer, where the latch and HTC are located.
6.4 Control Panel
The control panel includes…
Front panel assembly:stainless steel skin, white LED touch
panel assembly,and touch control module (TCM)
Sheet metal carrier
Display module, which is mounted to the carrier
The complete front panel assemblyis offered as the service
replacement for the stainless skin, touch panel, and/or TCM. These
components are not available separately.
The TCM is an electronic module which monitors,qualifies, and
transmits the inputs from the touch panel to the control module. After
start-up, the control module polls the TCM every 100ms to determine
which, if any, keys are activated. The responseto a each key press is
controlled by the control module.
A Front Panel Testis available in Service mode.See the Service
Mode sectionfor details.
The control panel mustalso be removed to service the temperature
and/or modeswitches,whichare rotary encoders.
Figure 20 Control panel for single oven with Euro-convection
Figure 21 Control panel for double oven with Euro-convection upper cavity and thermal lower cavity

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Figure 22 Detaching the control panel from the side trims
Figure 24 Front panel service assembly includes stainless skin, touch pad, TCM
Figure 25 Display board secured to carrier with 4 nylon spacers
Figure 23 Separating the carrier from the front panel assembly
6.4.1 Replacingthe Front Panel Assembly
1. Remove power to the oven.
2. Protect the top of the oven door to prevent damage to the
stainless front panel or door.
3. Remove two screws onthe underside of the panel assembly –
one on the right and one on the left –which securethe panel
to the vent trim;it is not necessaryto remove the centerscrew
at this time.
4. Swing the bottom of the control panel slightly outward, then lift
to disengage the side flanges of the front panel carrier from
the slots in the side trim.
5. Disconnectthe ground wire and the communicationharness
connectors at the display board and touch pad; set the front
panel on a flat work surface.
6. Remove the knobs.
7. Remove the screwin the bottom center of the panel, which
secures the panel to the carrierdirectly behind it.
8. Separate the carrier fromthe front panel assembly.
9. Reassemblethe control panel using the new front panel
service assembly.
10. Reattach the control panel, restore power, and test operation.
6.4.2 Replacingthe Display Module
The display module is securedto the control panel carrier with
four nylon spacers (standoffs).
NOTICE
Use care when detaching the front panel. There is very little slack in
the wires connecting the control module to the display board and the
control module to the LH switch, so it may not be possible to fully
rotate the front panel 90°.

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Figure 27 Removing the glass lens
1. Remove the front panel as described in Replacing the Front
Panel ServiceAssembly section.
2. Using pliers, gently pinch the top of each spacerclosed, then
lift each corner of the board off the spacer.
3. Position the new display board so that the holes in the corners
align with the four spacers,and firmly push the board
downward until all four corners snap securely in place.
4. Reassemblethe control panel.
5. Reattach the control panel to the side trim and vent trim.
6. Restorepower and test operation.
6.4.3 Replacingthe Rotary Switches
1. Remove the front panel asdescribed in steps 1-6 in the
Replacing the Front Panel ServiceAssembly section;the
switches will be visible on the carrier.
2. Remove the two screws securingthe switchand set aside.
3. Install the new switch.
4. Reassemblethe control panel.
5. Reattach the control panel to the side trim and vent trim,
restore power, and test operation.
6.5 Cavity Lights
Each 30” oven cavity uses one incandescent 40W appliance bulb with
a standard Edison base. Each 27” oven cavity uses two 25W
incandescent bulbs (25WPRE14),witha European base.
Replacement bulbs maybe purchasedlocally.
Figure 26 Left: 25W bulbs used in 27” ovens | Right: 40W bulb used in 30” ovens.
On double ovens, lights are either on or off in both cavities; it is not
possible to operate cavity lights independently.
The cavity light(s) can be turned on in two ways:by pressingOven
Light or opening the oven door. If Oven Light had not been pressed to
turn light(s) on prior to opening the oven door, the light(s) will turn off
when the door is closed.If Oven Light had been pressedto turn
light(s) on prior to opening the oven door, the light(s) will remain on
after the door is closed.
In other words,the Oven Light switchoverrides the door.
6.5.1 Replacingthe Lamp
1. Unscrewglass lens cover by turning it counter-clockwise.
NOTICE
Sometimes, after running a self-clean cycle at high heat, it may become
difficult to remove the glass lens. If it cannot be done by hand, an
adjustable strap-wrench may be used.
CAUTION
Turn off power to the oven at the fuse or breaker box–light socket
is live with door open.
Be sure oven and lights are cool to the touch.
Handle glass lenses and glass bulbs carefully.