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Barry G.
Barry G., Home Appliance Technician
Category: Appliance
Satisfied Customers: 6822
Experience:  27 years in home appliance repair. EPA refrigerant transition and recovery certification type I & II.
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The fan and light on microwave continue to run after cooking

Customer Question

The fan and light on microwave continue to run after cooking as stopped.
Submitted: 5 years ago.
Category: Appliance
Expert:  Barry G. replied 5 years ago.
Hello my name is Barry and I will be assisting you.

Unplug the microwave. Avoid touching anything inside that microwave other than the board and the touch panel. The capacitor in there stores voltage and it does store 1000's of volts and you would not want to get into that.

Disconnect the touch pad (arrowed blue) from the control board (arrowed green). If the fan and light then stays on when you open and close the door replace the control board, part number W10127098.

If it does not then stay lit replace the touch pad part number DE34-00233G.
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The U. S. Consumer Product Safety Commission (CPSC) warns against do-it-yourself repairs of microwave ovens. Each year, on average, four people die from electrocution trying to repair their microwave ovens. Microwave ovens use high voltage which makes it particularly hazardous for consumers to remove the cover and touch electrical parts. The possibility for electrical shock from a microwave oven still exists even after the oven is disconnected from the power source. Should certain internal devices fail, even unplugged ovens can cause serious injury.

The Commission strongly recommends that consumers have professionals repair microwave ovens because electrical appliances can be hazardous if consumers expose live electrical parts.

/!\ WARNING
ELECTROCUTION HAZARD
HIGH VOLTAGE

Removing the cover of your microwave oven and touching an electrical part can kill you.
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Barry
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Customer: replied 5 years ago.
after I remove the touchpad do I plug it back in
Expert:  Barry G. replied 5 years ago.
Yes you will have to plug it in to see if the light and fan are on.

Barry
Customer: replied 5 years ago.
This repair is out of my league. I don't know how to remove the touchpad.
Expert:  Barry G. replied 5 years ago.
I understand,

If you wanted to remove the touch pad the screws in the vent across the top outside of that panel have to come out first. Once that cover is removed there is a screw there to remove the control panel. Remove that screw and that tilts forward and then lifts out.

Barry
Expert:  Barry G. replied 5 years ago.
You can click below if you cannot continue and have your deposit refunded.

CLICK HERE.

Barry
Customer: replied 5 years ago.

That's as far as I got. At this point, there just seems to be too many wires and screws for me to understand what to do next.

 

Expert:  Barry G. replied 5 years ago.
I put a link above in case you wanted to use it. If you wanted to continue there are 2 ribbons going from the touch pad to the board. Those are the 2 to disconnect and then test to see if the light and fan stay on.

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You can click below if you cannot continue and have your deposit refunded.

CLICK HERE.

Barry