Question about Whirlpool MH1140XMS Microwave Oven
I have a whirlpool, built in the cabinet, above the range, microwave. I heated some water in a glass container (2 Min) when I saw a flash inside the microwave. I checked the breaker, I unplugged the micro. and replugged it in. Nothing. I even ran an extension cord from an outlet I know is hot and nothing.
The Model # is MH6130XEQ .
The date of manufacture shows January 1999.
Do you think this microwave has heated it's last taquito?
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.
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.
It may be the fuse, which is located in the upper area behind the control panel.
If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.
(Don't be confused by the base or hood thermostat, which is on the floor of the chassis. It will read normally open).
The fuse and magnetron thermostat can be checked with out taking the oven down from the wall, but if you need to check the oven thermostat, you will need to pull it from the wall.
To help with that, you can download Whirlpool owner's manuals and installation instructions here.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.
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
Posted on Nov 29, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017
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It sounds like the magnetron may have
either failed or is not being supplied with the extremely high
voltage required to run it.
SAFETY IS PARAMOUNT
This is a job for a professional but if
you are safety clued up, here's instruction.
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 or moving coil meter on high resistance range for short circuit, (DVM's won't show the fault!), the capacitor can fail and go short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.
simple safety test.
Place 1/2 litre of water in a glass container. Measure the temperature of the water.
Place in microwave and heat on full power for 1minute.
Measure the temperature after it has stood for 1minute.
If the temperature difference is more than 9 degrees Celcuis the magnetron is working and producing about 700Watts of heat.
If your microwave is labelled with 900 or 1000Watts. That is about right.
If the temperature is less then the magnetron is not working properly and may need replacing.
This a only a rough guide and any doubts you should consult an authorised service agent.
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