Dimplex BF33ST Quick start guide

PARTS & SERVICE MANUAL
FOR THE BUILT IN FIREPLACE
MODEL NUMBERS:
BF33ST/DX
BF39ST/DX
BF45ST/DX

TABLE OF CONTENTS
OPERATION PAGE 1
VOLTAGE SELECTOR SWITCH LOCATION PAGE 3
PARTS LIST DRAWING PAGE 4
PARTS LIST PAGE 5
WIRING DIAGRAM – LOWER SECTION PAGE 7
WIRING DIAGRAM – UPPER SECTION PAGE 8
WIRING DIAGRAM – SCHEMATIC PAGE 9
LIGHT BULB REPLACEMENT PAGE 10
MAIN ON/OFF SWITCH REPLACEMENT PAGE 11
HEATER ON/OFF SWITCH REPLACEMENT PAGE 12
FLAME MOTOR/FLAME ROD REPLACEMENT PAGE 13
VOLTAGE SELECTOR SWITCH REPLACEMENT
(UNIT IS PERMENANTLY INSTALLED IN WALL)
BF33ST,BF33DX PAGE15
BF39ST, BF39DX, BF45ST, BF45DX PAGE 17
VOLTAGE SELECTOR SWITCH REPLACEMENT PAGE 19
(UNIT CAN BE REMOVED FROM WALL)
HEATING ELEMENTS REPLACEMENT PAGE 20
(UNIT IS PERMENANTLY INSTALLED IN WALL)
HEATING ELEMENTS REPLACEMENT PAGE 21
(UNIT CAN BE REMOVED FROM WALL)
BLOWER MOTOR/BLOWER REPLACEMENT
(UNIT IS PERMENANTLY INSTALLED IN WALL)
BF33ST,BF33DX PAGE22
BF39ST, BF39DX, BF45ST, BF45DX PAGE 24

BLOWER MOTOR/BLOWER REPLACEMENT PAGE 25
(UNIT CAN BE REMOVED FROM WALL)
TEMPERATURE LIMIT SWITCH REPLACEMENT
(UNIT IS PERMENANTLY INSTALLED IN WALL)
BF33ST,BF33DX PAGE26
BF39ST, BF39DX, BF45ST, BF45DX PAGE 28
TEMPERATURE LIMIT SWITCH REPLACEMENT PAGE 30
(UNIT CAN BE REMOVED FROM WALL)
REMOTE CONTROL KIT REPLACEMENT PAGE 31

1
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
OPERATION
MANUAL CONTROLS
(WITHOUT REMOTE OPTION)
The fireplace can be controlled by the manual
switches located on the fireplace (FIGURE 1).
Main Power Switch
Main ON/OFF switch, activates the flame effect.
Heater Control Switch
Heater ON/OFF switch, activates heater to the high
level.
MANUAL CONTROLS
(WITH REMOTE OPTION)
The fireplace can also be controlled in a similar
manner to the remote control with the manual
switches located on the fireplace (FIGURE 2).
(refer to initialization instructions on page 2)
Main Power Switch
Main ON/OFF switch supplies power to the circuit
board. When the Main ON/OFF switch is switched to
the ON position the Level 1 indicator light will flash.
On Switch
1. Pressing once on the remote control board “ON
SWITCH” activates the Level 1 function.
Level 1: The flame effect is turned on and the first
red indicator light is activated.
2. Pressing twice on the remote control board “ON
SWITCH” activates the Level 2 function.
Level 2: The flame effect remains on, the heater
is activated to the low heat setting, and
the first and second red indicator lights are
activated.
3. Pressing three times on the remote control board
“ON SWITCH” activates the Level 3 function.
Level 3: The flame effect remains on, the heater
is set to the high heat setting, and all three red
indicator lights are activated.
Off Switch
Pressing this button ONCE will turn the unit OFF.
OFF
SWITCH
ON
SWITCH
LEVEL 1
INDICATOR
LEVEL 2
INDICATOR
LEVEL 3
INDICATOR
FIGURE 2
HEATER CONTROL
SWITCH
FIGURE 1
MAIN POWER
SWITCH
MAIN POWER
SWITCH

2
Main Power
Switch
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
REMOTE CONTROL
The remote control has a range of approximately 50ft. (15.25m). It
does not have to be pointed at the fireplace and can pass through
most obstacles (including walls). It is supplied with one of 243
independent frequencies to prevent interference with other units.
The frequency designation is indicated on the back of the
transmitter (FIGURE 3).
Remote Control Initialization
This procedure is required every time there is a loss of power to the
remote control in the fireplace (i.e. power failure, breaker tripped,
main power switch is turned off)
1. Ensure that power is supplied through main service panel.
2. Access the manual controls, (remove glass doors if applicable)
pull the right hand steel curtain to the side of the unit.
(FIGURE 4)
3. Locate manual controls refer to FIGURE 5.
4. Activate main power switch, (“ ” position is “ON”, “ ” position
is “OFF”) red Level 1 indicator light will flash.
5. Press and hold the ON switch marked “ ” for five seconds.
The red Level 2 indicator light will flash.
6. Press the ON button located on the remote control transmitter
(FIGURE 3). This will synchronize the remote control
transmitter and receiver.
Remote Control Usage
The remote control operates the fireplace levels sequentially. The level is increased
every time the ON button on the transmitter is pressed. The fireplace can be turned off
at any point by pressing the OFF button on the remote control transmitter.
Level 1: The flame effect is turned on and the first red indicator light is activated.
Level 2: The flame effect remains on, the heater is activated to the low heat setting,
and the first and second red indicator lights are activated.
Level 3: The flame effect remains on, the heater is set to the high heat setting, and all
three red indicator lights are activated.
FIGURE 3
MANUAL
CONTROLS
Level 1 Indicator
Level 2 Indicator
Level 3 Indicator
On Switch
Off Switch
FIGURE 4
Frequency
Code
FIGURE 5

3
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
RESETTING THE TEMPERTURE CUTOUT SWITCH
The heater on this fireplace is protected with a safety device to prevent overheating.
Should the heater overheat, an automatic cut out will turn the heater off and it will not
come back on without being reset. It can be reset by switching the Main Power switch
(FIGURE 1) to OFF and waiting 5 minutes before switching it to ON.
WALL MOUNTED CONTROLS
The fireplace can be installed with wall mounted controls. These controls include wall
switches and thermostats. (see installation guide for details)
A. Wall Mounted Switches
This model may be installed such that a wall mounted switch activates the flame effect
and a wall mounted heater switch activates the heater. A wall mounted switch can also
be installed to operate the heater independent of the flame.
B. Wall Mounted Thermostat
This unit may be installed such that a wall mounted thermostat can adjust the heat
temperature to your individual requirements. Turn the thermostat control clockwise all
the way to turn on the heater. When the room reaches the desired temperature, turn
the thermostat knob counter clockwise until you hear a click. Leave in this position to
maintain the room temperature at this setting. For additional heat, turn the thermostat
clockwise until you hear the click again and the heater will turn on. To turn the heater
off, turn the thermostat counter clockwise all the way, and/or turn the manual heater
switch on the unit to the OFF position.
VOLTAGE SELECTOR SWITCH LOCATION
IMPORTANT:
Ensure that the incoming power supply voltage
matches the setting of the voltage selector
switch.
NOTE:
The voltage selector switch is located
inside the exhaust panel on the top
right hand corner (FIGURE 6).
CAUTION:
When changing the voltage selector
switch from 240 volts to 120 volts
ensure that the power supply is turned
off.
NOTE:
Carefully insert a flat headed screwdriver inside the exhaust panel to change the switch
from 240 volts (230 position) to 120 volts (115 position).
FIGURE 6

4
9
1
5
15
13
12
17
11
10
18
2
4
16
14
3
6 7 8
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX

5
BF33ST, BF33DX, BF39ST, BF39DX
REPLACEMENT PARTS
DIMPLEX BUILT IN FIREPLACE
REPLACEMENT PART BF33ST BF33DX
1. LOG SET 0438200300RP 0438200300RP
2. REFLECTOR ROD 5900081000RP 5900081000RP
3. GROMMET 8500000600RP 8500000600RP
4. FLICKER ASSEMBLY 6901811200RP 6901811200RP
5. BLOWER ASSEMBLY 5300110300RP 5300110300RP
6. BLOWER MOTOR 5300110400RP 5300110400RP
7. HEATER ELEMENT 2200510100RP 2200510100RP
8. CUTOUT 2300200400RP 2300200400RP
9. VOLTAGE SELECTOR 2500320100RP 2500320100RP
10.MAIN ON/OFF SWITCH 2800070400RP 2800070400RP
11.HEATER SWITCH 2800070700RP 2800070700RP
12.MIRROR SEMI-SILVERED 5900161000RP 5900161100RP
13.EXTRUSION 0438650200RP 0438650200RP
14.STEEL CURTAIN 8800240403RP 8800240403RP
15.STEEL CURTAIN ROD 8800250300RP 8800250300RP
16.LAMPHOLDER 4200120700RP 4200120700RP
OPTIONAL ACCESSORIES
17. REMOTE CONTROL KIT BFRC-KIT
18. WALL THERMOSTAT TS901/TS901W
REPLACEMENT PART BF39ST BF39DX
1. LOG SET 0438550200RP 0438550200RP
2. REFLECTOR ROD 5900080900RP 5900080900RP
3. GROMMET 8500000600RP 8500000600RP
4. FLICKER ASSEMBLY 6901811200RP 6901811200RP
5. BLOWER ASSEMBLY 5300110300RP 5300110300RP
6. BLOWER MOTOR 5300110400RP 5300110400RP
7. HEATER ELEMENT 2200510100RP 2200510100RP
8. CUTOUT 2300200400RP 2300200400RP
9. VOLTAGE SELECTOR 2500320100RP 2500320100RP
10.MAIN ON/OFF SWITCH 2800070400RP 2800070400RP
11.HEATER SWITCH 2800070700RP 2800070700RP
12.MIRROR SEMI-SILVERED 5900160600RP 5900160700RP
13.EXTRUSION 0438650100RP 0438650100RP
14.STEEL CURTAIN 8800240103RP 8800240103RP
15.STEEL CURTAIN ROD 8800250100RP 8800250200RP
16.LAMPHOLDER 4200120700RP 4200120700RP
OPTIONAL ACCESSORIES
17. REMOTE CONTROL KIT BFRC-KIT
18. WALL THERMOSTAT TS901/TS901W

6
BF45ST, BF45DX
REPLACEMENT PARTS
DIMPLEX BUILT IN FIREPLACE
REPLACEMENT PART BF45ST BF45DX
1. LOG SET 0438550200RP 0438550200RP
2. REFLECTOR ROD 5900080900RP 5900080900RP
3. GROMMET 8500000600RP 8500000600RP
4. FLICKER ASSEMBLY 6901811200RP 6901811200RP
5. BLOWER ASSEMBLY 5300110300RP 5300110300RP
6. BLOWER MOTOR 5300110400RP 5300110400RP
7. HEATER ELEMENT 2200510100RP 2200510100RP
8. CUTOUT 2300200400RP 2300200400RP
9. VOLTAGE SELECTOR 2500320100RP 2500320100RP
10.MAIN ON/OFF SWITCH 2800070400RP 2800070400RR
11.HEATER SWITCH 2800070700RP 2800070700RP
12.MIRROR SEMI-SILVERED 5900160800RP 5900160400RP
13.EXTRUSION 0438650100RP 0438650100RP
14.STEEL CURTAIN 8800240203RP 8800240203RP
15.STEEL CURTAIN ROD 8800250200RP 8800250200RP
16.LAMPHOLDER 4200120700RP 4200120700RP
OPTIONAL ACCESSORIES
17. REMOTE CONTROL KIT BFRC-KIT
18. WALL THERMOSTAT TS901/TS901W

7
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
WIRING DIAGRAM - LOWER SECTION
BLACK
WHITE
BROWN
CITOR BYPASS HARNESS
LOWER HARNESS
WHITE
ORANGE FROM TOP BROWN FROM TOP RED FROM TOP
BLUE (3)
MOTOR
FLICKER
TWIST-TIE
RED
RED
2
1
RED (L2)
HEATER SWITCH
BLACK (L1)
WHITE (N)
GREEN
WHITE (N)
BLACK
BLUE (4)
RED (1)
MARR
MARR
SWITCH MAIN
BLACK (L1)
4B 5B 1A 2A
RED (2)
CAPA-
BLACK
BLUE
WHITE
WHITE
G
RED (L2)

8
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
WIRING DIAGRAM - UPPER SECTION
BLK
YLW
RED (CUT-OUT LONG WIRE)
RED (CUT-OUT SHORT WIRE)
CUT-OUT
BLK
YLW
ELEMENT #2
ELEMENT #1
2
BLK
6
4
BLK
YLW
1 5
3
BROWN
ORANGE
BLOWER WHEEL
BLK
BLW. MOTOR
BLK

9
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
WIRING DIAGRAM - SCHEMATIC

10
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
If unit was operating prior to servicing allow at least 10 minutes for light bulbs and
heating element to cool off to avoid accidental burning of skin.
Disconnect power before attempting any maintenance or cleaning to reduce the risk of
electric shock or damage to persons.
Light bulbs need to be replaced when you notice a dark section of the flame. There are
four bulbs under the log set which generate the flames and embers.
It is a good idea to replace all of the light bulbs at one time if they are close to the end of
their rated life. Group replacement will reduce the number of times you need to open
the unit to replace the light bulbs.
TO REPLACE LIGHT BULBS
1. Open the steel curtains (remove glass doors if applicable).
2. Remove the log grate retaining screws and remove the log grate.
3. Pull the rear edge of the log set forward by grasping the ember bed by the sides
(handle the log set only by the ember bed and not the logs) and pulling firmly
until the rear tab pops out from under the back ledge, then lift out.
4. Examine to determine which bulbs require replacement.
5. Unscrew bulb counter clockwise.
6. Insert new bulb screwing clockwise.
7. Replace the log set by inserting the front edge, pushing the back down until the
rear tab snaps under the back ledge and the logs are resting against the mirror.
Quantity 4 clear chandelier or candelabra bulbs with an E-12 (small) socket
base, 60 watt rating. Example GE 60BC or Philips 60CTC
CAUTION DO NOT EXCEED 60 WATTS PER BULB

11
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
If the fireplace was operating prior to servicing allow at least 10 minutes for light bulbs
and heating elements to cool off to avoid accidental burning of skin.
Disconnect circuit power before attempting any maintenance or cleaning to reduce the
risk of electric shock or damage to persons.
TO REPLACE MAIN ON/OFF SWITCH
1. Open the steel curtains (remove glass doors if applicable).
2. Remove the log grate retaining screws and remove the log grate.
3. Pull the rear edge of the log set forward by grasping the ember bed by the sides
(handle the log set only by the ember bed and not the logs) and pulling firmly
until the rear tab pops out from under the back ledge, then lift out.
4. Remove the light bulb closest to the main on/off switch for easier access.
5. Locate the switch cover plate and remove the mounting screws.
6. Remove the switch cover plate by releasing assembly from the quick connect
connection.
7. Reach hand into the opening and locate the main on/off switch.
8. Depress the retainer clips on the rear of the switch and push the switch out of the
bottom cover.
9. Disconnect the wiring connections noting their original locations.
10.Properly orientate the new switch and connect all of the wiring connections.
11.Reassemble in the reverse order as above.
NOTE: To replace the log set insert the front edge, pushing back down until the rear
tab snaps under the back ledge and the logs are resting against the mirror.

12
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
If the fireplace was operating prior to servicing allow at least 10 minutes for light bulbs
and heating elements to cool off to avoid accidental burning of skin.
Disconnect circuit power before attempting any maintenance or cleaning to reduce the
risk of electric shock or damage to persons.
TO REPLACE HEATER ON/OFF SWITCH (without remote control option)
NOTE: Remote control kit does not have individual heater switch. Refer to page 27
for remote control kit replacement instructions.
1. Open the steel curtains (remove glass doors if applicable).
2. Remove the log grate retaining screws and remove the log grate.
3. Pull the rear edge of the log set forward by grasping the ember bed by the sides
(handle the log set only by the ember bed and not the logs) and pulling firmly
until the rear tab pops out from under the back ledge, then lift out.
4. Remove the light bulb closest to the heater on/off switch for easier access.
5. Locate the switch cover plate and remove the mounting screws.
6. Remove the switch cover plate by releasing assembly from the quick connect
connection.
7. Depress the retainer clips on the rear of the switch and push the switch out of the
bottom cover.
8. Disconnect the wiring connections noting their original locations.
9. Properly orientate the new switch and connect all of the wiring connections.
10.Reassemble in the reverse order as above.
NOTE: To replace the log set, insert the front edge of the log set and pushing back
down until the rear tab snaps under the back ledge and the logs are resting against
the mirror.

13
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
If the fireplace was operating prior to servicing allow at least 10 minutes for light bulbs
and heating elements to cool off to avoid accidental burning of skin.
Disconnect circuit power before attempting any maintenance or cleaning to reduce the
risk of electric shock or damage to persons.
TO REPLACE FLAME MOTOR/FLAME ROD
1. Open the steel curtains (remove glass doors if applicable).
2. Remove the log grate retaining screws and remove the log grate.
3. Pull the rear edge of the log set forward by grasping the ember bed by the sides
(handle the log set only by the ember bed and not the logs) and pulling firmly
until the rear tab pops out from under the back ledge, then lift out.
4. Remove all lower light bulbs.
5. Remove the retaining screws on the light assembly retaining plate and set aside
retaining plate.
6. Reach hand into the opening created by removing the light assembly retaining
plate and locate the flame assembly mounting bracket screw.
NOTE:
Flame assembly bracket screw is secured to flame panel on the same side as the
manual control switches.
7. Remove the flame assembly mounting bracket screw using a ¼” hex head
wrench or socket.
8. Remove the flame rod from the flame assembly by pulling the rubber channel
section of the rod away from the flame motor.
9. Rotate the flame assembly down releasing the mounting tab from the rear panel.
NOTE:
In order for the mounting tab to release from the rear panel, the flame assembly
mounting bracket needs to be rotated a complete 90° down. Cutting of the wire tie
wraps may be required to move wires out of the way.
10.Disconnect the wiring connections noting their original locations.
11.Reassemble in the reverse order as above.
NOTE:
Ensure to secure the flame rod to the end of the flame motor prior to securing flame
motor assembly bracket to flame panel.

14
BF33ST, BF33DX, BF39ST, BF39DX, BF45ST, BF45DX
If the fireplace was operating prior to servicing allow at least 10 minutes for light bulbs
and heating elements to cool off to avoid accidental burning of skin.
Disconnect circuit power before attempting any maintenance or cleaning to reduce the
risk of electric shock or damage to persons.
TO REPLACE FLAME MOTOR/FLAME ROD
NOTE: To replace the log set, insert the front edge of the log set and pushing back
down until the rear tab snaps under the back ledge and the logs are resting against
the mirror.
WARNING: Ensure wires do not come in contact with moving parts by securing wires in
wire wraps.

15
BF33ST, BF33DX
If the fireplace was operating prior to servicing allow at least 10 minutes for light bulbs
and heating elements to cool off to avoid accidental burning of skin.
Disconnect circuit power before attempting any maintenance or cleaning to reduce the
risk of electric shock or damage to persons.
TO REPLACE VOLTAGE SELECTOR SWITCH
(UNIT IS PERMENANTLY INSTALLED IN WALL)
1. Remove the log grate retaining screws and remove the log grate.
2. Pull the rear edge of the log set forward by grasping the ember bed by the sides
(handle the log set only by the ember bed and not the logs) and pulling firmly
until the rear tab pops out from under the back ledge, then lift out.
3. Release the steel curtains from the side panels by opening the retainers on the
sides of the fireplace using needle nose pliers.
4. Remove the steel curtains by lifting up on the curtain mounting rod releasing it
from the side mounting tab, and pulling out.
5. Remove the heater cover mounting screws from inside the firebox and remove
the heater cover by lifting it up from the back, bowing it slightly in the center and
pulling out by one end.
6. Hold the mirror and use a sharp utility knife to cut the lip off of the rubber channel
(one side only) that holds the mirror in place.
7. Remove mirror by pulling it out of the cut rubber channel being careful not to
bump or drop it.
8. Remove the cut channel from the firebox.
9. Remove the heater assembly mounting screws from top panel.
10.Locate the voltage selector switch inside the exhaust panel on the top right hand
corner, and cut the wire tie wraps securing the voltage selector switch wires.
11.Remove the voltage selector wire connections from the heater elements noting
their original locations.
12.Cut and strip the brown and orange wires from the voltage selector switch along
the back panel allowing enough room to cut, strip and reconnect wiring.
13.Depress the retainer clips on the rear of the voltage selector switch and push the
switch out of the light block.

16
BF33ST, BF33DX
If the fireplace was operating prior to servicing allow at least 10 minutes for light bulbs
and heating elements to cool off to avoid accidental burning of skin.
Disconnect circuit power before attempting any maintenance or cleaning to reduce the
risk of electric shock or damage to persons.
TO REPLACE VOLTAGE SELECTOR SWITCH
(UNIT IS PERMENANTLY INSTALLED IN WALL)
14.Properly orientate the new switch and connect all of the wiring connections to the
heater elements.
NOTE: Ensure there is enough wire length to wire connect the wires together.
15.Cut and strip the brown and orange wires from the new voltage selector switch.
16.Use (2) wire connectors to connect the 4 stripped wire with their matching colour.
(brown wire with brown wire, orange wire with orange wire)
WARNING: Ensure wires do not come in contact with moving parts by securing
wires in wiring tie wraps.
17.Using a sharp utility knife, cut 3.22” off of the length of the new rubber channel so
the overall length is 17.33”.
18.Reassemble in the reverse order as above.
NOTE: Prior to installing the mirror, cut the one end off of the T-shaped groove on
the supplied rubber channel with a sharp utility knife as indicated in diagram below.
NOTE: To install the mirror after the factory installed rubber channel has been cut,
use the channel that was supplied with the replacement motor / blower. Slide the
channel onto the edge of the mirror and push the other side of the mirror into the
existing rubber channel in the firebox, carefully press mirror into the mounting slot on
the firebox.
NOTE: To replace the log set insert the front edge, pushing back down until the rear
tab snaps under the back ledge and the logs are resting against the mirror.
Remove the shaded area
from rubber channel with
sharp utility knife

17
BF39ST, BF39DX, BF45ST, BF45DX
If the fireplace was operating prior to servicing allow at least 10 minutes for light bulbs
and heating elements to cool off to avoid accidental burning of skin.
Disconnect circuit power before attempting any maintenance or cleaning to reduce the
risk of electric shock or damage to persons.
TO REPLACE VOLTAGE SELECTOR SWITCH
(UNIT IS PERMENANTLY INSTALLED IN WALL)
1. Remove the log grate retaining screws and remove the log grate.
2. Pull the rear edge of the log set forward by grasping the ember bed by the sides
(handle the log set only by the ember bed and not the logs) and pulling firmly
until the rear tab pops out from under the back ledge, then lift out.
3. Release the steel curtains from the side panels by opening the retainers on the
sides of the fireplace using needle nose pliers.
4. Remove the steel curtains by lifting up on the curtain mounting rod releasing it
from the side mounting tab, and pulling out.
5. Remove the heater cover mounting screws from inside the firebox and remove
the heater cover by lifting it up from the back, bowing it slightly in the center and
pulling out by one end.
6. Locate the voltage selector switch inside the exhaust panel on the top right hand
corner, and cut wire the tie wraps securing the voltage selector switch wires.
7. Remove the voltage selector wire connections from the heater elements noting
their original locations.
8. Cut and strip the brown and orange wires from the voltage selector switch along
the back panel allowing enough room to cut, strip and reconnect wiring.
9. Depress the retainer clips on the rear of the voltage selector switch and push the
switch out of the light block.
10.Properly orientate the new switch and connect all of the wiring connections to the
heater elements
NOTE: Ensure there is enough wire length to wire connect the wires together.
11.Cut and strip the brown and orange wires from the new voltage selector switch.