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Microwave doesn't have any power, ** Display, **thing...

My microwave, KitchenAid KHMS147KSS-0, suddenly went dead. ** display, nothing... The power coming to the receptacle is good. I checked both fuses in the microwave and both measured good. I plug in the microwave and the power is going past the fuses, proving the fuses are good. I removed and measured both micro-switches on door (upper and lower) and they are working.

Here is a schematic of the circuit. What am I missing?


Posted by galneedshelp on

  • galneedshelp Mar 16, 2008

    When I measure the black and white wire on the LV transformer, I get .8 ohms. On the blue and red wire, I get infinite ohms. This tells me that the transformer winding is faulty. Do you agree? If so, can you give me the price for this part to zip code 80112? Item is stamped with #461964874701.

    Thanks for much for your help!!

  • galneedshelp Mar 31, 2008

    Thanks so much for your help. This web site is awesome!! I ordered the transformer and am awaiting delivery. I'm crossing my fingers that it will solve the problem. Love this site!



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William Miller

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Nice touch with the diagram. Thanks!

The neutral line passes through the cavity thermostat, which may be open. In the schematic, it's left of the center bottom.

In the pictorial diagram, it's located just below where you added the note "120V OK". Its top half is cut off in the picture and it has blue and white wires attached.

Also, the low voltage (LV) transformer shows fuses in its primary and secondary, although one or both may be internal and inaccessible.

It may also be a problem on the control board, which we repair nationwide for only $39.95 postpaid. Feel free to reply back if you need further assistance.

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Mar 10, 2008

  • William Miller
    William Miller Mar 17, 2008


    The part number is AP3034117 and you can order that here:

    We're happy to help and we appreciate your thoughtful rating of our answer.



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