Question about Whirlpool RMC275PD Microwave Oven

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Microwave wont start

When you enter the time and press start the microwave makes this sputtering noise. Sometimes it will sputter for a bit and start but usually it shorts out and stops. Then you have to enter time again and start again. It also seems to help if you smack the side of the unit next to the control panel while it is sputtering after you press start.

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  • Whirlpool Master
  • 9,098 Answers

It sounds like a door switch going bad, or a bad connection on your control board. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk If it's a problem with the control panel assembly, we repair those nationwide for $39.95.

Posted on Sep 22, 2007

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6ya6ya
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Posted on Jan 02, 2017

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Sounds like a bad control board. Change it or buy another unit.

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That sounds like maybe a high voltage wire or component is running too close to the chassis or one of the components connected to it.

Gruesome as it sounds, sometimes a pest can get inside the works and can move wires around or be killed, then its carcass can conduct electricity and cause arcing.

It may instead be a failing high voltage diode.

To find helpful exploded view diagrams and get part numbers, you can just enter your full model number (66562619200) at the Sears parts site.

Here are some links you or someone you know can use (in order given) for test help, but

http://www.gallawa.com/microtech/cap_test.html

http://www.gallawa.com/microtech/diode.html
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http://www.gallawa.com/microtech/mag_test.html
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We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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I would first suspect a shorted high voltage rectifier diode or possibly a defective magnetron.

If the noise is just a loud buzz, I would suspect the diode. If it has more of a hollow sound - like someone gurgling into a coffee cup - then I would suspect the magnetron.

Here are some links you or a friend can use for test help, but PLEASE read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

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

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The magnatron is shorting, overloading the high voltage transformer. From the picture this looks like an older unit and is probably not worth a magnatron replacement.

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This can be caused by a bad connection on the control panel, at the fuse holder, or the thermal cutout / thermostat on the microwave. I would suspect a bad connection on the control panel which we can repair for you with our $39.95 nationwide service. We have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk I don't have an online source for an exploded view, but I may have a paper coipy here. If you are interested, follow up directly and I can see.

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It could be the motor failing (gears jamming due to internal damage or bad grease, perhaps) or the turntable coupler or support may have gotten warped due to heat. One test is to gently but firmly grab the coupler or turntable support and try to turn the motor. A good motor will offer resistance and "whirr" as you turn it. A bad motor will grind or click, etc. I would call Westpoint (see your owner's manual) and they can tell you if the parts are available and what they'd cost. Other listings seems to indicate this is an 800W microwave. And I would bet that parts may not be easily available. The turntable can usually be replaced from the bottom without taking the wrapper off. Once you've found out about parts availability, feel free to drop by my site (see my profile) to get my microwave safety and disassembly texts.

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