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Repair and disassembly guides for GE Microwave ovens.

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Microwave loses all power, LEDs, etc. Works again after power drain.

I have a GE cabinet mount microwave model PVM9005EJ2ES (manufactured NOV 2016) that started acting up a few months ago. The first few times, it tripped the Arc fault breaker in the garage. (Test button trips it and allows normal reset.) The gas oven shares this circuit. I would reset it, and the microwave was fine. Then a week or so later, microwave would have no lights on it, clock blank, no beeps on the control panel, no interior light. Nothing. No signs of power. If I unplug it and plug it back in immediately, it's still dead. If I unplug for at least 30 seconds, then plug it back in, the lcd clock does a lamp test then begins working normally. I set the clock and it appears to run fine. (For a while. Sometimes days, couple weeks, or multiple times a day.) To rule out the breaker, I ran a large gauge extension cord to another circuit in the house, not on gfci, or afci. Same issue. I'd walk into the kitchen, blank clock and no signs of power.

(The AFCI breaker was installed at the same time as the microwave during a remodel. About 2017.)

Since I can restore functionality by leaving it unplugged for a short while then plugging back in, i'm wondering if this time unplugged is allowing capacitors to drain, to allow it to work again.

I do warranty pc and printer repairs for work, so i'm sure I could handle a board replacement. I was only able to find a very basic parts diagram to show the teardown. Before I get frustrated enough with it that I grab my toolbag from my truck and start dissecting it, hoping to find a part that “let the smoke out” does anyone have any ideas to where I should check first? Or any leads on better documentation?

Could something like a thermal switch be tripping to lock itself out? Door seems to close and open fine and engage the interior light, so I don't suspect the door switch. The controls are on the door and work with it open.

Answer this question I have this problem too

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Hi @dancoco ,

Here’s some info that may be of some help or maybe not ;-)

The GE mini manual i.e. service manual, part number is 31-41093. Unfortunately I can’t find a free download online, I could only find this link but you have to join to download. The manual should have the wiring diagram for the oven.

Losing power and then having the power restore by disconnecting/reconnecting the power to the oven is like a power reset or perhaps whatever may be being held by any residual power in the oven is released (relay?).

There are also 3 thermostats in your model but I don’t know if any of them would control the power supply to the control board or not. It may be that some do prevent the oven from operating but maybe not from indicating that there is power connected. Only the wiring diagram would show or if you trace the power supply input in the oven to see if the active lead goes via a thermostat before getting to the control board.

There is also this link which in general describes how to test the various components in a microwave oven which may also be of some use, if you can’t get the manual.

Be safety aware when working in microwave ovens. The HV capacitor can store >5000V DC for months even if the power has been disconnected from the oven for this length of time. This amount of voltage can seriously injure you. The HV capacitor needs to be discharged correctly, as soon as it can be accessed after the cover has been removed from the oven and before any further work is done inside the oven. If you don’t know what you’re doing, then don’t do it! Call a reputable, professional appliance repair service and ask for a quote.

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I would agree with you assessment that is probably is the caps but the best way to find a problem is to open it up. Just be sure to short the caps & coils before you hand touches anything

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Daniel Cocozzelli will be eternally grateful.
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