Question about Whirlpool MH7140XF Microwave Oven

1 Answer

4-yr old microwave gold accusystem

The control panels are lit. When heating food, it will go through the cycle but will not heat up the food. The light inside does not turn on but the fan will turn on. Also, the exterior fan and light will not turn on but the control panel will show the function.

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  • Anonymous Dec 24, 2008

    We are having the same problem with the microwave. Also, a weird, ghastly sound appears to come from the interior. HELP!!!

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  • Whirlpool Master
  • 19,396 Answers

If it is working but not heating, then test the high voltage capacitor,the rectifier diode.or the magnetron. If all this are fine, test the control board.If turntable is not running check also the door switch.

The diodeand capacitors can be tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, evenif power is off.Capacitors can get discharged by shorting their two contacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.



All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

You can also order from MicrowaveSvc , they also provide parts.

Posted on Apr 28, 2009

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