Question about Whirlpool MH7140XF Microwave Oven

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Whirlpool MH7140XFQ-1 microwave no longer heating

My Whirlpool microwave, Model # MH7140xfq-1, just quit heating. All the lights, push buttons, and turn table work but food no longer gets hot. MWO was purchased back in Jan 2001 and has been worked on as part of a recall several years back.

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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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Posted on Jan 02, 2017

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Whirlpool MH7140XFQ Fuse to Breaker Problem


There is absolutely no way to guess at the problem. You need to troubleshoot the circuitry with a meter to find the failing component

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you need to look at the ends on your fuse and this will tell you the amperage you need to get for your particular unit,get them from a hardware store

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I have a whirlpool model MH7140XFQ and we got a guy to come and look at it and he said the Mag. tube and the circuit bars were broken. Which would be more expensive to change the broken things or just...


He is referring to the magnatron tube which is the heart of the microwave. Probably more expense than you would want to put in to it.I would recommend replacement unless it is a high end model. Hope this helps

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Microwave not working


est the high voltage capacitor,the rectifier diode.or the magnetron. If all this are fine, test the control board.

Thediode and capacitors can br tested. The capacitor must bealloweddischarge before testing, or you risk to get electrocuted, evenifpower is off. Capacitors can get discharged by shorting theirtwocontacts.
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.

Dec 19, 2008 | Whirlpool MH7155XM Microwave Oven

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Whirlpool MH7140XFQ


It's most likely caulk. It can usually be sliced with a razor blade.

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

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

Sep 21, 2008 | Whirlpool MH7155XM Microwave Oven

1 Answer

Owner


Check the internal fuse. Unplug it, unscrew and take off the cover, the fuse should be easily found in the back by the power cord. It looks like a regular fuse but is white instead of clear glass because microwave fuses are special. You'll have to measure it with a meter as a result and be sure to replace it with the same kind. (try finding them at radio shack) Hopefully there isn't something more serious also.
Hope ya fix it!

Jan 09, 2008 | Microwave Ovens

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