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Vent fan won't turn off

The fan came on while cooking and won't go off even when we push the button to turn it off and even after unplugging for 5 minutes. i have even flipped the breaker and it still won't turn off.

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  • Microwave Ovens Master
  • 8,973 Answers

This may be a shorted hood fan TCO (thermal cutout or thermostat) or a problem on the control board.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

There should 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, and locating components.

Atour Web site, we have a videoavailable showing how to remove a typicalover the range control panel assembly in under 5 minutes.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases in about a week or so.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Dec 21, 2008

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Elise,

So I'm understanding that the lock icon stays on no matter what you have tried. I would try pressing and holding the START/STOP button for 5-10 seconds to see if it changes. I don't know how long you've been leaving it unplugged for when you do unplug it, but i would suggest at least 3-5 minutes. If these don't work what I would do is either contact the manufacturer or maybe even a local authorized technician. This way they would be able to assist and possibly have some more suggestions or be able to find and solve the issue for you.

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I had the same problem with the fan not wanting to shut off after the repair. Once I set the clock though I was able to push the button to shut the fan off. So try setting your clock first and see if that helps.

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Microwave won't work, I was cooking on the stove and the fan came on and then everything went out on the microwave suddenly


There is a thermostat which detects when the temperature from the cooktop is too high, and it makes the hood vent exhaust fan come on to cool it to protect the controller.

That's I always recommend that you use the vent fan whenever you're cooking on the stove top to keep heat, steam, and grease out of the controls and door panels.

Assuming the wall outlet is good, the first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

If that doesn't work, leave it unplugged for about 5 minutes.

If it's still dead, another thermostat may be blown,or the fuse.

You can find links to helpful exploded view diagrams and order parts here.

I'd recommend that your bookmark this link to your favorites.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Usually the fuse and magnetron thermostat will be accessible for testing behind the controller.

If those are good, then it may be a bad oven cavity thermostat, and checking that will require you to remove the oven from the wall and take off the outer cover.

Behind the controls in many microwaves is a technical sheet, which helps in locating and testing components.

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

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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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I have a GE Profile Spacemaker model JVM1660SB005, maufactured in November 2000. I attempted to change a burned out bulb on the left side. I did not check the manual to see how to remove the bulb, nor...


I regularly see (and repair) this light and / or fan failure on model JVM1660SB005 and most any model of over the range microwave.
The problem is on the controller assembly, which I regularly repair very affordably.

At my Web site, you can get details, plus I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

For more free DIY and other help & advice, feel free to contact me via my site.

Please include FULL model number*, FCC ID number*, + detailed symptom information. ( * on the tag in cooking cavity or around door frame or control frame or on back)

William E. Miller, AS-EET
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

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1 Answer

I have a GE Profile Spacemaker model JVM1660SB005, maufactured in November 2000. I attempted to change a burned out bulb on the left side. I did not check the manual to see how to remove the bulb, nor...


I regularly see (and repair) this light and / or fan failure on model JVM1660SB005 and most any model of over the range microwave.
The problem is on the controller assembly, which I regularly repair very affordably.

At my Web site, you can get details, plus I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

For more free DIY and other help & advice, feel free to contact me via my site.

Please include FULL model number*, FCC ID number*, + detailed symptom information. ( * on the tag in cooking cavity or around door frame or control frame or on back)

William E. Miller, AS-EET
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

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I would suspect a sticky relay first, but the door switches should be checked.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya: http://tinyurl.com/yzjozk

If you need your control panel assembly (smart board) repaired, we do that for $39.95 nationwide.

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

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