Question about KitchenAid Microwave Ovens

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Vent fan turns on by its self and it will not turn off

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  • KitchenAid Master
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(I'd say it's a failed or failing thermostat on the control circuit board or the hood TCO / thermal cutout / thermostat)

And if FixYa would inform us experts when as persons responds to a request for more information, we could reply back quickly.

But since (for some reason) they won't, you'll just have to post a new help request.

But please be sure to include the full model number from the tag on the oven, and exact symptoms - what it's doing or not doing, and when.

Posted on Feb 17, 2014

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Posted on Jan 02, 2017

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2 Answers

My frigidaire microwave fan turned on by it self. Won't turn off. Blowing air above Microwave


Try unplugging it for a few seconds or turning off the circut breaker to it. This usually resets the unit.

Jan 03, 2015 | Microwave Ovens

1 Answer

My microwave oven model 721.85033111 vent fan stays on


You probably have a bad fan thermostat. This thermostat is supposed to turn on the vent fan if the microwave oven gets too hot (caused by cooking too much or having too many burners turned on on the range beneath the microwave oven). It should shut off in about 15 minutes after your turn off the range burners. But if it comes on for no reason, or won't turn off, then You probably have a bad fan thermostat.

Aug 10, 2014 | Kenmore Microwave Ovens

1 Answer

Vent fan wont turn off


Steve,

The vent fan is thermostat controlled to protect the control panel. Once the panel temp drops, this will turn off by itself. This is normal for this to occur when your steaming and cooking for a long time. Good Luck

Apr 22, 2014 | Maytag Over-the-Range Microwave

1 Answer

GE Spacemaker XL1800 JVM1850CH01 vent fan won't turn on


Unplug for about 5 minutes and allow to reset. If the problem persist, you might want to try replacing the control panel (the one that have all the numbers and timers). Good Luck!

Jan 13, 2014 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

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

Jan 01, 2011 | Samsung Microwave Ovens

2 Answers

GE microwave fan not turning off


hello,

what this means is that your oven has develop a partial contact from the wire which supply power to the fan of your oven

what you need to do to fix up your oven is to unscrew the oven then trace the wire down to the fan you will see two wire red and black or white either of this wire is touching the body of the oven this while the fan come up it self then make sure that all wire are well place on there position

thank you and good lock .

Jun 01, 2010 | General Electric Microwave Oven

1 Answer

Active vent keeps opening and closing though fan is off.


When the unit begins the never ending opening and closing cycle, turn the vent fan on for a few seconds and then turn the fan off. This seems to stop the active vent from opening and closing. If this is GE quality, this is the last thing that I am going to purchase. GE refrigerators are garbage and now I am having problems with a new microwave oven.

Apr 27, 2009 | General Electric PVM1870SMSS Microwave...

1 Answer

GE Microwave Profile Spacemaker Runs on its own


Your microwave turning on by itself is a "self preservation feature" of the GE Profile Advantium and maybe some other models. Read the manual, When your over the range oven gets warm enough, for whatever reason the venting fan comes on until a satisfactory oven temperature is reached. You are not permitted to shut the vent fan off. Also it seems a temperature near room temp must be achieved before it shuts the fan motor off, it is very annoying. We had to return our Advantium because of fan noise. I configured the ovens vent fan to the recirculate direction because we do not have a vent duct that exits the house over our range. When the vent fan acting as the ovens cooling fan automatically turned on we would have to leave the house to hear each other talk. Too bad we really liked the oven other than that major problem. G-Man

Apr 19, 2009 | GE Profile Spacemaker Over-the-Range...

1 Answer

I have an LG LMVH1750ST microwave convection oven. When I activate the fan for cooking purposes and then try to turn off, it does not respond. I have to pull electrical plug and reprogram for one minute....


From the owner's manual under OPERATION "VENT FAN":

"If the temperature from the range or cooktop below the oven gets too hot, the vent fan in the vent hood will automatically turn on at the 4-Speed setting to protect the oven. When this occurs, the VENT ON/OFF pad will not turn the fan off."

You should check your "vent fan auto time set" setting.

Here's one thing to try to set it to turn off after 10 minutes:

Touch the Vent ON/OFF pad, then touch the "5-SPEED VENT" pad until "level 4" appears in the display, then touch "AUTO TIME SET" the desired number of times.

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

Jun 19, 2008 | LG Microwave Ovens

1 Answer

Mircowave works, exhaust door opens, fan stop working


From looking at the owner's manual, it looks like the vent fan is only supposed to come on when the internal temperature of the microwave gets too high OR when you press the VENT FAN pad. Here are a couple of fan-related excerpts from the owner's manual, which can be found here: http://products.geappliances.com/ProdContent/Dispatcher?REQUEST=SKUOBJECTS&DOCUMENT=Use%20and%20Care%20Manual&SKU=JVM1840BD (or the better URL here: http://tinyurl.com/yn7r6g) Automatic Fan An automatic fan feature protects the microwave from too much heat rising from the cooktop below it. It automatically turns on if it senses too much heat. If you have turned the fan on, you may find that you cannot turn it off. The fan will automatically turn off when the internal parts are cool. It may stay on for 30 minutes or more after the cooktop and microwave controls are turned off. - Vent Fan The vent fan removes steam and other vapors from surface cooking. Press VENT FAN once for high fan speed, twice for medium fan speed, a third time for low faw speed, or a fourth time to turn the fan off. Press the VENT FAN BOOST pad for extra fan speed. - Hope this helps.

Oct 31, 2006 | GE JVM1840 Microwave Oven

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