Question about Whirlpool MH7155XM Microwave Oven
I have purchased the diode for this model. I cannot locate the old diode to replace it. Diagrahms I find are not very clear. I have the front control pad off(hanging) and can see wires, cage blower wheel, etc. Do you have a real life picture pointing out the diode? Thanks.
Curious, but did you know the diode was shorted without measuring it before you ordered the new one? I hope that's the problem.
In any case, there should also be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.
It usually has a perspective view drawing showing the relative locations of the components (parts layout).
If you don't have your tech sheet, you can find it online here and look on pages 3 & 4.
The diode (rectifier) is connected to one terminal of the high voltage capacitor and the other end goes to the chassis for ground.
It is located behind the magnetron in the back of the unit. You'll probably have to take the oven down from the wall to get to it safely.
Whirlpool customer service is here and you can also enter your model number on that page to download your owner's manual, installation instructions, etc.
Please read & heed the safety info in the tech sheet.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Oct 08, 2008
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Posted on Jan 02, 2017
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