Question about GE JVM1740DM Microwave Oven

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Vent fan not working on high or low.

The vent fan worked the first time I used it. Now when I turn it on high or low it sounds like its getting the command but just not working. Is this thermostat controlled?

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No, it is not controlled by a thermostat

Posted on Nov 26, 2009

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Whirlpool microwave fan not working


I would unplug the oven for 2 minutes to do a hard reset and try it again, just in cause there was a glitch.

Without knowing your full model number from the tag on the oven, I would wonder if it has a separate internal cooling fan from the hood vent exhaust fan. It could be an unrelated issue.

For more free DIY and other help & advice, feel free to contact me with your full model number and FCC ID number from the tag on your oven.

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Does the exhaunst fan turn on automatically when we cook or warm food items in our Samsung Microwave -- SMH 9187W?


Some interesting reading on page 8 of the owner's manual:

"Boilovers cause smoking and greasy spillovers that may ignite and spread if the vent fan is operating.To minimize automatic fan operation, use adequate sized cookware and use high heat on surface units only when necessary."

And on page 20:

"If the temperature becomes too hot around the microwave oven, the fan in the vent hood will automatically turn on at the LEVEL 2 setting to cool the oven. The fan will automatically turn off when the oven has cooled down sufficiently. This is an automated process and cannot be turned off. The fan may stay on for 30 minutes or more after the cooktop and microwave controls are turned off. The Vent Fan will only operate in 1~4 levels modes while the microwave is working."

"Using the Vent delay off button
1. Press the Delay Off button once to turn the fan off after 1 minute.
2. Press the Delay Off button twice to turn the fan off after 3 minutes.
3. Press the Delay Off button three times to turn the fan off after 5 minutes.
4. Press the Delay Off button fiour times to turn the fan off after 10 minutes.
5. Press the Delay Off button five times to turn the fan off after 30 minutes."

If for some reason you don't have your owner's manual, you can still download it free here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer

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A low tech solution worked for me.

I too was getting the "Vent Fan Off" message, and despite the fact that everything else worked fine with the microwave, I turned the breaker off and back on from my electrical panel. The fan works fine now.

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Possibly, the "fault" was the buzzing in the first place! Buzzing is usually a cabinet vibration caused by magnetic fields from the "gubbins". If the buzzing should occur again, try pushing/ pulling/ poking the cabinet while the oven is running, you may find a position that causes the buzz to stop.
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Fan Stuck On.


You should have a one-year warranty on parts and labor and then a 5-year part warranty on the magnetron.

It sounds like the hood fan thermostat is flaky, or there may be a shorted relay or diode on the control panel.

But I would definitely avail myself of warranty service.

You can get your manual here: http://www.geappliances.com/service_and_support/literature/

GE Customer Service is at http://www.geappliances.com/service_and_support/contact/

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

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