Question about Whirlpool MH7140XF Microwave Oven

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The microwave turns on, but doesn't heat up anything. Light turns on, fan turns on but no heat.

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Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

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Posted on Sep 30, 2010

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  • 2 Answers

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Posted on Jan 02, 2017

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Microwave turns on but no heat and turntable doesn't turn


It is one of two things, a defective door switch, "most likely" or the keypad control board is faulty.

Apr 22, 2012 | GE Spacemaker JVM1540 Microwave Oven

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My microwave won't heat anything up. The light comes on, the plate turns round and it makes all the right noises but it doesn't heat anything up.


Since the light and fan work the main board or the processor is working .Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html

As there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off. Check the wave guide covers, if food had deposited
then it must be checked or replaced.

See link: http://www.espares.co.uk/advice/microwave/a/5/1146/how-to-replace-a-microwave-guide-cover.html

Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely

Thank You for using FIXYA.

Sep 17, 2011 | Belling Microwave Ovens

2 Answers

Noise while not running


don;t worry;
all you need to do is lubricate the fan bearings with light machine oil and make sure the fan is not hitting anything

Apr 18, 2009 | Kenmore 63682 / 63684 / 63689 Microwave...

1 Answer

Microwave on w/light but fan and heat not working


Hi,
The problem is the door switch is defective. I'm on my third new switch in 3 years. The part number is 5304440026.

Mar 29, 2009 | Electrolux Microwave Ovens

1 Answer

Does not heat food


It could be 3 problems. 1. the part that spits out the microwaves needs replacement, door hinge switch is broken, or circuit board need replacement. First check with Whirlpool and see if it is under warranty still. Call a repair man. See www.repairclinic.com .

Mar 20, 2009 | Whirlpool MH1150XMQ Microwave Oven

2 Answers

Can't use the microwave at all


you have either a bad keypad or control board.

If you have operation of some buttons and not others its the keypad. if you have no operation out of the buttons at all you have a bad control board.

If you turn your microwave on and it sets and the timer counts down you have a bad interlock switch..

please let me know exactly what your microwave does when you set the cook time

Jan 08, 2009 | Emerson MW8102SS 1100 Watts Microwave Oven

1 Answer

Dacor dcm24s.light, fan, and control panel work but turntable and heat do not


Most likely the bottom door switch. Dacor units are built by Sharp and that switch is a very common problem. You'd either need to check the switch with an ohm meter or remove the cover of the switch to see if it's burned inside.

Oct 20, 2008 | Sharp R-930AK Convection/Microwave Oven

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