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Fan keeps going after Microwave stops

How can i stop my built-in microwave fan, when i close the door, its ok heating up items

I don't know the model no. as it came with the Ikea Kitchen

Thanks for your help, as i'm glad i found your site!

More info

As i found the manual for it: it's a

BUILT-IN Microwave Oven MUMW23SS With Building In Trim TUK23SS, if that helps.

Thanks

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It is Aug 2019 and this answer helped me. Answers are timeless. Keep on answering. It might be too late for the first person who asked but for the rest of us - golden.

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Jill, thank you. I appreciate your comment.

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iPhone LCDスクリーン修理キット

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iPhone LCDスクリーン修理キット

品質ではなく、修理コストを削減しましょう。

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The exhaust fan thermostat is usually the failed component. When it senses heat it turns on the exhaust fan. If you are cooking on the cooktop, it can sense the heat and the fan won't turn off until the thermostat cools.

On several models of microwaves the thermostat is super sensitive, causing the exhaust to run longer than needed. Replacing the thermostat didn't help much. Adding a washer under the thermostat allowed air to move around it, keeping it cooler, thus, the fan didn't run as long.

It is also common for this thermostat to fail causing the fan to constantly run.

The thermostat is a round disk with 2 terminals. It is a simple bimetal that warps to make or break contact. It is an inexpensive part $20-$50.

It is NOT an easy part to get to. The microwave has to be completely uninstalled and placed on a sturdy table. The cabinet needs to be removed. Then discharge the capacitor. If you don't know how to properly discharge a capacitor, I would suggest having it repaired by a certified/qualified technician.

==UNPLUGGED == A CAPACITOR CAN HOLD UP TO 4,000 VOLTS.

THAT CAN AND WILL KILL YOU...DEAD

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I hadn't paid much attention to the dates.

I thought I'd help out on the unanswered questions .

LoL I'll pay attention the dates from now on. Thanks

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Why would you tell someone not to answer a question just because it wasn't asked recently? This is the only answer and is on the first page of Google results. The bane of my life is finding relevant questions online with no answers.

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Bobby, thank you for helping me out! I feel the same as you do. I’ll continue answering questions no matter how old they are. I like to compare all answers when I’m searching for help. Dates don’t matter.

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Thank you for answering this expired question. I am looking for an answer to this question now. June, 2018. It was a helpful answer. Thank you.

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Thanks Pat. I’m glad I helped.

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The microwave fan will sometimes come on when your not using the microwave. It does this when your cooking something on the cooktop below the microwave. Boiling potatoes or pasta or something that is creating steam is usually the culprit.

The thermostat senses the heat and turns the fan on.

You should have the microwave checked out by a qualified technician. A survey test should be performed by technician every time it is serviced.

Remember, the capacitor inside a microwave can hold 4,000-6,000 volts even after its been unplug for days and even weeks.

This means that a microwave doesn’t need to be plugged in to KILL you.

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I found if I place a small fan so it blows across the stove top it prevents it from happening or shortens the duration if it does.

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I know that this may sound like I’m joking, but I am not doing so. We just now experienced this issue with our microwave. After trying several solutions, I firmly (but gently) hit the edge of the door of the microwave with the heel of my hand below the control panel, and that worked to turn it off. As I mentioned above, this is something that just now happened, so I am NOT going to try to recreate the scenario.

The microwave is a GE - Model number is: JNM3151RF1SS

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Ken さん、ありがとうございました!
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