How do i bypass thermal fuse and door switch on sony kf42we610

Please count the amount of blinks before it pauses. The number of blinks will say if the door isnt latched all of the way or if the thermal fuse has popped above the lamp area. Hope its a 6 blink as that is the thermal fuse which is easy to bypass or replace.

six times means the thermal fuse on top of the lamp tripped. Replace it and give it a good cleaning and it should work.

Check the continuity of the thermal fuse located on the blower housing. This thermal fuse is wired in series with the motor and once blown, power to the motor is terminated and the dryer will not start. Also the power to the heating circuit is activated through the motor centrifugal switch. The dryer will therefore not heat once the motor cannot run.

Disconnect power then access the thermal fuse on blower housing.


Dryers with lint filter on the front.


Dryers with lint filter on the top.

You can bypass the thermal fuse for troubleshooting purposes by disconnecting the wires and connecting them together. Insulate the connection properly and plug the dryer back in. The thermal fuse is indeed blown and needs to be replaced along with the cycling thermostat if the dryer starts. Do not use the dryer with the thermal fuse bypassed due to fire hazards.

Let us know if you need further advice but indicate the exact model number of the dryer.

This problem is commonly caused by a blown thermal fuse located on the blower housing. The thermal fuse is wired in series with the motor and the motor activates a centrifugal switch for the heating element when it runs. These setup makes the dryer fail to start and the heating element not to turn on if the thermal fuse is blown. The dryer seems to no work at all. Verify the condition of the thermal fuse by bypassing it and starting the dryer.

Disconnect power then access and bypass the thermal fuse on the blower housing. The blower housing is located on the rear left bottom of the dryer cabinet. Remove the rear panel to access the blower housing and so the thermal fuse.



Bypass the thermal fuse by disconnecting the wires and connecting them together. Insulate them properly and plug the dryer back in. The thermal fuse is indeed blown and needs to be replaced along with the cycling thermostat if the dryer starts. Do not use the dryer with the thermal fuse bypassed due to fire hazards.

The thermal fuse and cycling thermostat are part numbers 3392519 and 3387134, respectively.

The problem is usually caused by a blown thermal fuse. Disconnect power then access and bypass the thermal fuse on the blower housing. The blower housing is located on the rear left bottom.



Bypass the thermal fuse by disconnecting the wires and connecting them together. Insulate them properly and plug the dryer back in. The thermal fuse is indeed blown and needs to be replaced if the dryer starts. Do not use the dryer with the thermal fuse bypassed due to fire hazards.

It's either of the thermal fuse on the blower housing or the thermal fuse on the heater enclosure is blown. These thermal fuses are wired in series with the motor and therefore, if any of them is blown will cause the motor not to run and hence the dryer not to work except the controls.

Disconnect power to the dryer prior to servicing to avoid the risk of electric shock.

Open the dryer door and remove the four screws located vertically along the inside lip of the door opening. These screws hold the front panel to the front shroud assembly.


Once the four screws are removed, grasp and press in on the upper edges of the front panel posts then twist it inward to release the clips holding it to the cabinet. Tilt the top of the front panel and move it away from the dryer.


Bypass the thermal fuse on the blower housing by disconnecting the wires and taping them together or connecting a jumper wire between them. Close the door then plug and start the dryer.


The dryer should start and heat up if the blower housing thermal fuse is the culprit. Otherwise, the other thermal fuse on the heater enclosure is blown. Unplug the dryer then bypass the thermal fuse on the heater enclosure in the same way the first is bypassed to confirm it.


Plug the dryer back then restart it. The dryer should start to confirm that the heater enclosure thermal fuse is blown. Replace the thermal fuse (part number 307473) together with the high-limit thermostat (part number 303396).

Unplug the dryer and unbypass the blower housing thermal fuse then plug it back and restart it. If the dryer fails to restart, replace also the blower housing thermal fuse (part number 33001762) together with the cycling thermostat.

Reinstall the front panel in reverse steps of the removal steps to complete the repair.

More than likely it is the G1 board or Thermal Fuse. I replace the thermal fuse and it is still giving me the 6 blinking red lights. Thermal fuse is $40 and cheapest G1 board I have found on-line is $120. I am about to pull the trigger on the G1 board and give it a shot.

yes you can temp. bypass to see if it runs if so replace fuse and look for a lint clog in vent
just plug the wires toghter add some tape or make sure the wires do not ground to anthing. remeber to unplug

If the thermal fuse is ok then the door switch or door switch actuator maybe.

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Check your breaker first and then the wiring. Check power coming from the timer next. With a load and resistance that you had, you could have tripped one of the breakers.Since you have bypassed the thermal fuse, it probably is the timer switch.