Miele H 408 BM Series Manual

TECHNICAL INFORMATION
H 408x BM Speed Ovens
© 2013 Miele USA

Technical Information
2
H 408x BM
Table of Contents
AWarning and Safety Instructions ............................................................6
1General Information............................................................................................... 6
2Discharging the High-Voltage Capacitor ............................................................... 6
3Microwave Energy................................................................................................. 7
4Precautions to Be Observed Before and During Service Work to Avoid Possible
Exposure to Excessive Microwave Energy ...........................................................8
BModification History.................................................................................8
CTechnical Data..........................................................................................9
DComponent Layouts ..............................................................................11
1Appliance Overview............................................................................................. 11
2Overview of Controls ........................................................................................... 12
3Electrical Components ........................................................................................ 13
3.1H 4080 BM............................................................................................... 13
3.2H 4082 BM and Later .............................................................................. 14
011Casing, Door Lock .................................................................................15
4 Service ................................................................................................................ 16
4.1Installation Procedure.............................................................................. 16
4.2Before Using the Appliance ..................................................................... 17
4.3 Appliance Removal (From a Cabinet) .....................................................18
4.4Outer Side Cover Removal...................................................................... 18
4.5Side Panel Removal ................................................................................ 18
4.6Removing the Door Lock Torsion Spring................................................. 18
4.7Door Latch Removal................................................................................ 19
4.8Door Lock Removal ................................................................................. 20
4.9Door Switch Adjustment .......................................................................... 21
012 Air Duct, Magnetron...............................................................................25
1 Technical Data .................................................................................................... 26
2 Function............................................................................................................... 26
2.1Air and Vapor Ducting ............................................................................. 26
2.2Fan Cooldown ......................................................................................... 27
2.3Microwave Operation............................................................................... 27
4 Service ................................................................................................................ 29
4.1Front Air Duct Removal (up to Machine No. 10/59114003)..................... 29
4.2Rear Air Duct with Cooling Fan (M2/1) Removal (up to Machine No.
10/59114003) .......................................................................................... 30
4.3Air Duct Removal (after Machine No. 10/59114004)............................... 31
4.4Removing the Release Element (Y56) .................................................... 33
4.5Cooling Fan (M2/1) Removal (up to Machine No. 10/59114003) ............ 33
4.6Cooling Fan (M2/1) Removal (after Machine No. 10/59114004)............. 34
4.7Testing the Magnetron (G2) Filament...................................................... 34
4.8Magnetron Test ....................................................................................... 35
4.9Magnetron (G2) Removal ........................................................................ 35
4.10Removing High-Voltage Capacitor A4..................................................... 36

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H 408x BM
4.11Microwave Output Test............................................................................ 37
4.12High-Voltage Transformer Test ............................................................... 37
4.13Transformer (1T1) Removal .................................................................... 38
4.14High-Voltage Capacitor Test ................................................................... 38
4.15Checking High-Voltage Capacitor A4 for Grounding ............................... 39
4.16Diode V1 Test.......................................................................................... 39
4.17Checking Protective Diode V6................................................................. 40
4.18No Microwave Power – Diagnosis Procedure ......................................... 40
020 Door.........................................................................................................43
4 Service ................................................................................................................ 44
4.1Door Seal Removal ................................................................................. 44
4.2Removing the Door Outer and Middle Panes.......................................... 44
4.3Removing the Door Handle ..................................................................... 45
4.4Removing the Door Inner Pane ............................................................... 45
4.5Removing the Door, Complete with Hinges............................................. 45
4.6Door Hinge Removal ............................................................................... 46
031 Oven Cavity, Wave Distribution............................................................47
1 Technical Data .................................................................................................... 48
3 Fault Repair......................................................................................................... 48
3.1Iridescent Shine in Oven Cavity (H 4082 BM) ......................................... 48
4 Service ................................................................................................................ 48
4.1Removing Wave Distributor Motor M21................................................... 48
4.2Halogen Lamp Removal .......................................................................... 50
4.3Measuring the Temperature in the Middle of the Oven Cavity ................ 50
032 Convection Fan, Heaters.......................................................................52
1 Technical Data .................................................................................................... 53
2 Function............................................................................................................... 53
2.1Safety Cutoff............................................................................................ 53
2.2Heater Element Timing............................................................................ 53
2.3Heater Element Switching in Operating Modes....................................... 54
2.4Convection Fan ....................................................................................... 54
4 Service ................................................................................................................ 54
4.1Fan Impeller Removal .............................................................................54
4.2Convection Fan (M2/2) Removal............................................................. 55
4.3Removing Convection Heater Element R14............................................ 56
4.4Convection Thermostat Removal ............................................................ 56
4.5Removing the PT1000 Temperature Sensor (1R30)............................... 56
4.6Removing Broil Heater Element R15....................................................... 57
040 Control Panel, Electrical System ..........................................................58
2 Function............................................................................................................... 59
2.1Navitronic Touch Display......................................................................... 59
2.2Connectors on Power Electronic EPL (1N1) (H 4080 BM Only).............. 61
2.3Connectors on Power Electronic ELP (1N1) (H 4082/4/6/8 BM) ............. 63
3 Fault Repair......................................................................................................... 65
3.1Fault Code Summary............................................................................... 65
3.2F05 – Short Circuit, Oven Temperature Sensor ...................................... 66
3.3F06 – Open Circuit, Oven Temperature Sensor...................................... 66
3.4F44 – Control Electronic/Power Electronic Interface Defective ............... 66

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3.5F54 – Short Circuit, Roast Probe............................................................. 67
3.6F55 – Safety Cutoff.................................................................................. 67
3.7F60 – Temperature of Power Electronic Too High .................................. 67
3.8Incorrect Language Was Set ................................................................... 67
3.9Time Display in 24-Hour Format/12-Hour Format ................................... 67
3.10Oven Light Goes Out/Does Not Go Out .................................................. 68
3.11Modes in the Main Menu Were Changed ................................................ 68
3.12Cooking Process Does Not Start............................................................. 68
3.13Recommended Temperatures Are Changed........................................... 68
3.14Display Dims............................................................................................ 68
3.15Display Is Too Bright/Too Dark................................................................ 68
3.16Displays Look Different............................................................................ 68
3.17Buzzer Tone Too Loud/Too Soft ............................................................. 69
3.18System Lock Cannot Be Activated .......................................................... 69
3.19Weight in Pounds .................................................................................... 69
3.20Temperature in °C/°F............................................................................... 69
3.21Appliance Does Not Heat ........................................................................ 69
3.22Fuse Trips................................................................................................ 69
3.23Roast Probe Shows Wrong Values ......................................................... 70
3.24Safety Relay (K1) Trips ...........................................................................70
4 Service ................................................................................................................ 71
4.1Programming Mode Overview (H 4080 BM)............................................ 71
4.2Programming Mode Overview (H 4082/4/6/8 BM)................................... 73
4.3 Service Mode Overview (H 4080 BM) ..................................................... 75
4.4 Service Mode Overview (H 4082/4/6/8 BM) ............................................ 77
4.5Reading and Deleting the Fault Memory ................................................. 79
4.6Fascia Panel Removal............................................................................. 79
4.7Removing the Fascia Panel with Support Plate ......................................80
4.8Support Plate Removal............................................................................ 81
4.9Power Electronic Removal ......................................................................81
080Technical Service Bulletins...................................................................82
1 H4XXX Cooling Fan Behavior ............................................................................. 82
2 H 4080 BM Control Panel Fogging...................................................................... 82
3 Speed Oven Broil Element Replacement............................................................ 83
4 Speed Ovens: Optional Waveguide Cover.......................................................... 83
List of Figures
Figure A-1: Discharging the High-Voltage Capacitor ........................................................7
Figure D-1: Overview of Appliance (Front View)............................................................. 11
Figure D-2: Overview of Controls (H 4082 BM Shown) ..................................................12
Figure D-3: H 4080 BM Component Layout.................................................................... 13
Figure D-4: H 4082/4/6/8 BM Component Layout........................................................... 14
Figure 011-1: Handling Instructions Sheet (Shipped with Appliance).............................16
Figure 011-2: Retaining Screws...................................................................................... 17
Figure 011-3: Door Lock Torsion Spring.........................................................................19
Figure 011-4: Ducting and Door Latch............................................................................20
Figure 011-5: Wire Bracket and Hooks ........................................................................... 20

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H 408x BM
Figure 011-6: Door Lock Removal ..................................................................................21
Figure 011-7: Magnetic Strips.........................................................................................23
Figure 011-8: Door Safety Switches ............................................................................... 23
Figure 011-9: Right Safety Switch 3F6/6 and Screw ...................................................... 24
Figure 012-1: Ducting...................................................................................................... 27
Figure 012-2: Magnetron and High-Voltage Components .............................................. 28
Figure 012-3: Microwave Components ...........................................................................29
Figure 012-4: Front Air Duct Removal ............................................................................ 30
Figure 012-5: Rear Air Duct Removal ............................................................................. 31
Figure 012-6: Air Duct Removal, Step 1 ......................................................................... 32
Figure 012-7: Air Duct Removal, Step 2 ......................................................................... 32
Figure 012-8: Release Element Removal ....................................................................... 33
Figure 012-9: Cooling Fan Removal ...............................................................................34
Figure 012-10: Magnetron Removal ............................................................................... 36
Figure 012-11: High-Voltage Transformer with Test Points Marked ............................... 37
Figure 012-12: Diode V1 Test Circuit.............................................................................. 39
Figure 020-1: Door Pane Removal ................................................................................. 44
Figure 020-2: Door Hinge Removal ................................................................................ 46
Figure 031-1: Wave Distributor Motor Removal.............................................................. 49
Figure 031-2: Temperature Test .....................................................................................51
Figure 031-3: Sample Measurement with an Ambient Temperature of 20°C (68°F) ...... 51
Figure 032-1: Convection Plus, Auto Roast .................................................................... 54
Figure 032-2: Broil, Convection Broil .............................................................................. 54
Figure 032-3: Microwave................................................................................................. 54
Figure 032-4: Microwave + Convection Plus, Microwave + Auto Roast (Sequential
Operation) ................................................................................................. 54
Figure 032-5: Microwave + Broil, Microwave + Convection Broil (Sequential
Operation) ................................................................................................. 54
Figure 032-6: Fan Impeller Removal............................................................................... 55
Figure 032-7: Broil Heater Element Removal ................................................................. 57
Figure 040-1: Navitronic Display (H 4080 BM Shown).................................................... 59
Figure 040-2: Optical Interface........................................................................................ 60
Figure 040-3: Power Electronic (H 4080 BM) ................................................................. 61
Figure 040-4: Power Electronic (H 4082/4/6/8 BM) ........................................................ 64
Figure 040-4: Fascia Panel Removal.............................................................................. 80
List of Tables
Table C-1: US Data Sheet .............................................................................................. 10
Table 012-1: Technical Data ........................................................................................... 26
Table 012-2: High-Voltage Transformer Checks............................................................. 37
Table 031-1: Technical Data ........................................................................................... 48
Table 032-1: Technical Data ........................................................................................... 53
Table 040-1: Power Electronic Connections (H 4080 BM).............................................. 63
Table 040-2: Power Electronic Connections (H 4082/4/6/8 BM)..................................... 65
Table 040-3: Fault Codes................................................................................................ 66
Table 040-4: H 4080 BM Programming Mode ................................................................ 73
Table 040-5: H 4082/4/6/8 BM Programming Mode ....................................................... 75
Table 040-6: Service Mode (H 4080 BM)........................................................................ 77
Table 040-7: Service Mode (H 4082/4/6/8 BM)............................................................... 78

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H 408x BM
A Warning and Safety Instructions
1 General Information
Danger!
Normally when the oven is switched off, the built-in discharge resistors in
the high-voltage capacitors discharge the capacitors.
For safety reasons, it is important to ensure that this discharge
takes place by always short-circuiting the high-voltage capacitors
before starting any maintenance or repair work. See Section A-2 for
instructions.
When the oven is connected to the power supply, the following
components have potentially lethal voltage applied to them:
- High-voltage transformer (T1)
- Capacitor (high-voltage circuit) (A4)
- Diode (V1)
- Protective diode (V6)
- Magnetron
The high-voltage circuit continues to have power present even with
the appliance unplugged!
Note:
Before starting any service work, disconnect the machine from the power
supply. Service and repair work should only be carried out by qualified
persons in accordance with all appropriate local and national safety
regulations.
When carrying out measurements on an electronic connected to the
power supply, always use narrow measuring probes. Contacts are very
closely spaced and using thicker probes may cause short circuits.
2 Discharging the High-Voltage Capacitor
Note:
Although the high-voltage capacitor contains an internal bleed resistor to
automatically discharge the capacitor, the following procedure must be
performed! Do not rely on a functioning resistor!
1. Unplug the appliance.
2. Remove the screws securing the appliance lid. Remove the lid.
3. Using an insulated-handled screwdriver, touch the blade from one
terminal on the capacitor to the other terminal on the capacitor, as shown
in Figure A-1. This may result in a rather startling “pop!”
4. Using the same insulated-handled screwdriver, touch the blade from each
terminal on the capacitor to the frame (ground) of the appliance.

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H 408x BM
Figure A-1: Discharging the High-Voltage Capacitor
3 Microwave Energy
Microwave energy is created by the magnetron or another microwave
generator.
Danger!
The human body must not be subjected to any microwave energy under any
circumstances, as this could result in serious internal injuries.
The following measures must always be complied with:
The magnetron or other microwave generator must be connected
properly.
All input and output connections, waveguides, flanges and seals must be
sealed correctly.
A microwave oven must never be operated without a microwave load.
Never look into an open waveguide or antenna when the appliance is on.
In order to ensure that no microwave energy can escape after any
repair work has been completed, the appliance must be thoroughly
checked for microwave leaks in accordance with all applicable local
and national regulations. (In Germany, VDE regulation 0700 and CEE
regulation 335 apply.)
Checks should be carried out using a suitable microwave leak detector in
accordance with the manufacturer's instructions. Particular care should be
taken around the door, casing edges, and visible vents.
The maximum permissible value is 5 mW/cm2, measured at a distance of
5 centimeters (2 inches) from the appliance with a water load of 275 cm3
±15 cm3.

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H 408x BM
4 Precautions to Be Observed Before and During Service
Work to Avoid Possible Exposure to Excessive
Microwave Energy
Do not operate or allow the oven to be operated with the door open.
Make the following safety checks on all ovens to be serviced before
activating the magnetron or other microwave source, and make repairs as
necessary:
- Interlock operation
- Proper door closing
- Seal and sealing surfaces (arcing, wear, and other damage)
- Damage to or loosening of hinges and latches
- Evidence of dropping or abuse
Before turning on microwave power for any service test or inspection
within the microwave-generating compartments, check the magnetron,
wave guide or transmission line, and cavity for proper alignment, integrity,
and connections.
Any defective or maladjusted components in the interlock, monitor, door
seal, and microwave generation and transmission systems shall be
repaired, replaced, or adjusted by procedures described in this manual
before the oven is released to the owner.
A microwave leakage test to verify compliance with national performance
standards should be performed on each oven prior to release to the owner.
B Modification History
When? Who? What?
4/2/2013 Jessica Naples Minor changes throughout
7/3/2012 Jessica Naples Tech service bulletins added
2/13/2012 Jessica Naples Tech service bulletins added
9/8/2011 Jessica Naples Updated
8/25/2009 Jessica Naples Conversion for Website
4/9/2009 Christina Lemster-Bach Version 9
8/12/2008 Christina Lemster-Bach Version 8
4/16/2008 Christina Lemster-Bach Version 7
7/16/2007 Christina Lemster-Bach Version 6
6/7/2006 Christina Lemster-Bach Version 5
11/16/2005 Christina Lemster-Bach Version 4
7/13/2005 Christina Lemster-Bach Version 3
6/6/2005 Christina Lemster-Bach Version 2
6/1/2005 Christina Lemster-Bach Version 1

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H 408x BM
C Technical Data
Features Model
H 4080 BM H 4082/4/6/8 BM
Design Compact oven with integrated microwave
Dimensions
Appliance dimensions
H x W x D 17.6” x 21.5” x 21.3”
Niche dimensions
Height 17.6” – 17.8”
Width 22.0” – 22.4”
Depth min. 21.9”
Weight1108 lbs
Cavity material High-grade textured steel
Capacity 1.31 cu. ft.
Cavity height 8.0”
Cavity base dimensions
W x D 18.1” x 15.4”
Levels in cavity (for racks) 3
Supervision-compatible No Yes
Accessories included Roast probe
Halogen lamp power rating 10W
Controls
Navitronic standard text display
with touchpad controls Yes
Time display/Clock back-up Yes/Yes
Delay start/Cooking time/End Yes/Yes/Yes
Minute minders 2
MW recommended output Yes
Recommended temperature Yes
Actual temperature indication Yes (not during preheat)
Change language Yes
Optical interface Yes
Adjustable microwave output,
lowest/highest 80/1000 W at 240V, 80/850 W at 208V
Minute + Start (quick start at
maximum power for 60 sec) Yes

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H 408x BM
H 4080 BM H 4082/4/6/8 BM
Operating modes/functions
Solo functions
Bake, Bake surround No Yes
Convection bake
Heater output at 240V 2100W
Max. temperature setting 435°F (225°C)
Broil
Broiler output at 240V 2180W (fixed setting)
Available broiling area 183in2
Auto roast Convection mode; starts at higher temperature and then
switches to the selected temperature
Max. temperature setting 425°F (210°C)
Convection broil Broiler and convection fan
Max. temperature setting 400°F (200°C)
Combination functions
Microwave + Convection bake
plus
Microwave and convection bake times have to be set the
same.
MW + Broil Microwave and broil times have to be set the same.
MW + Convection broil Microwave, broil and convection fan times have to be set the
same.
Masterchef programs Yes
Favorites Yes
Sabbath mode Yes
Safety
Automatic shutoff Yes
Safety shutoff Yes
System lock while running /
when not running No/Yes
Tip protection / Slide-out
protection Yes/Yes
Cool front panel (max. 140°F) Yes
Door contact switch Yes
RemoteVision-compatible No Yes
Power connection
Voltage AC 208/120 V – 240/120 V
Frequency 60Hz
Connected load 2.2kW (240V), 1.76kW (208V)
Fuse rating 20A
Table C-1: US Data Sheet
1If installing the oven into a cabinet, make sure that the cabinet or the wall can support it.

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H 408x BM
D Component Layouts
1 Appliance Overview
Figure D-1: Overview of Appliance (Front View)
1 Control panel
2 Upper heating element (broiler)
3 Light
4 Roast probe socket
5 Level runners (3)
6 Oven door

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H 408x BM
2 Overview of Controls
Figure D-2: Overview of Controls (H 4082 BM Shown)
1 Menu touchpads
2 Numeric touchpads
3 On/Off touchpad
4 Minute+ touchpad
5 Display
6 Clear touchpad
7 Timer touchpad
Note:
The Clear and Timer touchpads are switched on H 4080 BM models.

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H 408x BM
3 Electrical Components
3.1 H 4080 BM
Figure D-3: H 4080 BM Component Layout
1 (R14) Convection heater 16 (F1/2) Magnetron thermostat (275°F)
2 (M2/2) Convection fan 17 (G2) Magnetron
3 (1F1/1) Oven cavity thermostat (275°F) 18 (3N1) Electronic EV w/drop resistor R34
4 (1R30) Oven temperature sensor
(PT1000)
19 (F8) Fine-wire fuse
20 (V1) Diode
5 (R15) Broiler 21 (V6) Protective diode
6 (1F6/6), (2F6/6), (5F6/6) Left door lock
with 3 safety switches
22 (A4) High-voltage capacitor
23 (Y56) Release element
7 (2T1) Lighting transformer 24 (3F6/6), (4F6/6) Right door lock with 2
safety switches
8 (2F1/1) Thermostat - Fan Heat safety
cutoff (248°F)
25 (1A1) Control electronic (EPX)
26 (2A1) Selection electronic (EW)
9 (Z1) Interference suppression filter 27 (1H3/2) Oven cavity light
10 (X5), (X10/1) RemoteVision socket 28 (X5/8) Socket for roast probe
temperature sensor
11 (M2/1) Cooling fan
12 (1N1) Power electronic (EPL) 29 (2R30) Roast probe temperature sensor
13 (K1) Safety relay
14 (M21) Stirrer - wave distributor
15 (1T1) High-voltage transformer

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H 408x BM
3.2 H 4082 BM and Later
Figure D-4: Component Layout for H 4082 BM and Later
1 (R14) Convection heater 14 (F1/2) Magnetron thermostat (275°F)
2 (M2/2) Convection fan 15 (G2) Magnetron
3 (1F1/1) Oven cavity thermostat (275°F) 16 (V1) Diode
4 (2F1/1) Thermostat - Fan Heat safety
cutoff (248°F)
17 (V6) Protective diode
18 (A4) High-voltage capacitor
5 (1R30) Oven temperature sensor
(PT1000)
19 (Y56) Release element
20 (3F6/6), (4F6/6) Right door lock with 2
safety switches
6 (R15) Broiler
7 (1F6/6), (2F6/6), (5F6/6) Left door lock
with 3 safety switches
21 (1A1) Control electronic (EPX)
22 (2A1) Selection electronic (EW)
8 (2T1) Lighting transformer 23 (1H3/2) Oven cavity light
9 (Z2) Interference suppression capacitor 24 (2R30) Roast probe temperature sensor
10 (M2/1) Cooling fan Not
shown (X5/8) Socket for roast probe
temperature sensor
11 (1N1) Power electronic (ELP) - Includes
fuse F8
12 (M21) Stirrer - wave distributor
13 (1T1) High-voltage transformer

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H 408x BM
011 Casing, Door Lock

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H 408x BM
4 Service
4.1 Installation Procedure
Note:
This appliance is designed for installation into a tall cabinet in combination
with an oven, in a tall cabinet or under the countertop.
Caution!
Heating elements may be hot even though they are not glowing.
Note:
To avoid preventable damage to the appliance, follow the handling
instructions attached to the top of the appliance, as shown in Figure 011-1.
Figure 011-1: Handling Instructions Sheet (Shipped with Appliance)
1. Ensure that the supports and the opening in the cabinet allow for proper
installation.
2. Ensure that the electrical supply meets the appliance requirements (see
data tag on the appliance for details).

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H 408x BM
3. Remove all materials from the oven.
4. Place the oven near the cabinet opening.
5. Ensure that the power is off.
6. Connect the oven to the electrical supply.
7. Set the oven into the cabinet niche, push it all the way in, and align as
necessary.
8. Open the oven door and attach the appliance to the cabinets using two
retaining screws at the sides of the frame, as shown in Figure 011-2.
9. Perform “Before Using the Appliance” procedures (refer to Section 011-4.2).
Figure 011-2: Retaining Screws
4.2 Before Using the Appliance
Note:
The following steps must be performed after performing the installation
procedure (Section 011-4.1).
To ensure proper operation, the following items should be programmed
appropriately for the customer’s needs:
Language
Time of day
Time format (12/24 hour format)
Display clock option
1. Remove the protective film from the front of the appliance (if present).
2. Wipe the interior with a solution of warm water and liquid dishwashing
detergent.
3. Dry with a soft cloth.
4. Leave the door open until the interior is completely dry.
5. Close the oven door.
6. Wash the accessories.

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H 408x BM
Important!
New ovens may have a slight odor during the first use. To eliminate the
odor, the oven should be operated at a high temperature for 2 hours.
Before heating the oven, remove all accessories and labels from the oven
and ensure that the room is well ventilated during this process.
7. Touch the On/Off touchpad.
8. Select the "Bake" function.
9. Select "Convection Bake".
10. Select "Temperature".
11. Set the temperature to 435 °F (225 °C) using the keypad.
12. Select "Duration".
13. Set the duration to two hours by entering "2", "0", "0" using the numeric
keypad.
14. Touch the OK touchpad. The oven will run for 2 hours; the remaining time
appears in the display.
4.3 Appliance Removal (From a Cabinet)
1. Open the door.
2. Take all items out of the oven cavity.
3. Remove the screws securing the appliance to the cabinet (see Figure 011-2).
4. Lift the appliance out of the cabinet.
5. Disconnect the power cable.
4.4 Outer Side Cover Removal
1. Remove the appliance from its cabinet; see Section 011-4.3.
2. Remove the four T20 screws securing each side cover. Remove the side covers.
4.5 Side Panel Removal
1. Remove the appliance from its cabinet; see Section 011-4.3.
2. Remove the outer side covers. See Section 011-4.4.
3. Remove the five T20 screws securing the left side panel (3 on bottom, 2
on top). Remove the left panel.
4. On the right side panel, remove the T20 screws securing the high-voltage
capacitor and diode. Lay the capacitor on its side, inside the appliance, to
reduce strain on the diode wires.
5. Remove the five remaining T20 screws securing the right side panel (3 on
bottom, 2 on top). Remove the right panel.
4.6 Removing the Door Lock Torsion Spring
1. Remove the appliance from its cabinet; see Section 011-4.3.
2. Remove the screws securing the appliance lid. Remove the lid.
Danger!
Before performing any service or repair work, discharge the high-voltage
capacitor. See Section A-2.
3. Open the door.
4. Push the door latch up and hold (Figure 011-3, Item 1).

Technical Information
19
H 408x BM
5. Unhook the top arm of the torsion spring by pressing forward and down
(Figure 011-3, Item 2).
6. Remove the torsion spring.
Figure 011-3: Door Lock Torsion Spring
Note:
When installing the torsion spring, do not push the latch upward.
Insert the bottom arm of the torsion spring into the notch on the latch (Figure
011-3, Item 3).
Danger!
After the repair is completed, as a matter of standard practice, check the oven
for a tight seal with a microwave leak detector, paying particular attention to
the door and the housing edges.
4.7 Door Latch Removal
1. Remove the appliance from its cabinet; see Section 011-4.3.
2. Remove the screws securing the appliance lid. Remove the lid.
Danger!
Before performing any service or repair work, discharge the high-voltage
capacitor. See Section A-2.
3. Remove the fascia panel with support plate. See Section 040-4.7.
4. Remove the door safety switches (door lock); see Section 011-4.8.
5. Remove the two screws securing the ducting front corners, if applicable (Figure
011-4, Item 1).
6. Disconnect the connectors on the magnetron thermostat.
7. Remove the two screws securing the magnetron thermostat.
8. Release the magnetron thermostat.
Note: H 4082/4/6/8 BM ovens
do not have the support plate
shown in Figure 011-3.

Technical Information
20
H 408x BM
9. Slightly lift the front of the ducting (Figure 011-4, Item 3).
10. Open the appliance door.
11. Lift up the door lock and remove the latch (Figure 011-4, Item 4).
Figure 011-4: Ducting and Door Latch
12. Turn the wire bracket by 90°. See Figure 011-5.
13. Pull the wire bracket out of the hooks in the door latch.
Figure 011-5: Wire Bracket and Hooks
Danger!
After installing the door lock, adjust the door switches. See Section 011-4.9.
After installation is completed, as a matter of standard practice, check the
oven for a tight seal with a microwave leak detector, paying particular attention
to the door and the housing edges.
4.8 Door Lock Removal
1. Remove the appliance from its cabinet; see Section 011-4.3
2. Remove the screws securing the appliance lid. Remove the lid.
Danger!
Before performing any service or repair work, discharge the high-voltage
capacitor. See Section A-2.