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kelly123  
#1 Posted : Wednesday, December 3, 2008 12:47:42 PM(UTC)
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kelly123

Rank: Member

Groups: Registered
Joined: 11/15/2008(UTC)
Posts: 14

Dear Friends,
I'm having a problem exactly as Dave posted in September where all looks and sounds fine in microwave mode except it doesn't heat. I have noticed on my oven a cover that closes over the light bulb during the microwave process is rotating closed then returning to the open position after a few "bounces" in the closed position. This doesn't seem right, but I don't know. Does this cover interlock the microwave process?

After removing the keypad, I found a switch that is actuated by the oven light cover. At first it didn't seem to be working as I checked the blue & yellow wires that appeared to be coming from the switch to the PC board. When I took the switch off it checked OK. I followed the wires and found that the switch is in series with a thermal switch that reads open. This is described as "Hood T.C.O." Does this sound like the problem?

Sorry to ramble on with the "play-by-play". Maybe some of this is helpful.

Thanks, Kelly
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abadfish66  
#2 Posted : Wednesday, December 3, 2008 1:15:19 PM(UTC)
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abadfish66

Rank: Advanced Member

Groups: Senior Expert
Joined: 5/28/2008(UTC)
Posts: 1,620

The hood tco should be open. It is designed to turn the vent fan on if the bottom of the m/w get's to hot from cooking on the stove. Look closely at the top switch of the latch assy. Look for a small melted spot where the terminal meets the plastic housing of the switch. If this switch is bad or the bottom one it won't heat.
kelly123  
#3 Posted : Thursday, December 4, 2008 8:43:50 AM(UTC)
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kelly123

Rank: Member

Groups: Registered
Joined: 11/15/2008(UTC)
Posts: 14

Thanks abadfish, your diagnosis looks right on the money. The top door switch is scorched and reads flaky. I have ordered the top and bottom switches from APP which were in stock. Thanks again, Kelly
abadfish66  
#4 Posted : Thursday, December 4, 2008 9:22:28 AM(UTC)
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abadfish66

Rank: Advanced Member

Groups: Senior Expert
Joined: 5/28/2008(UTC)
Posts: 1,620

No problem
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