Question about Microwave Ovens

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When you shut door on microwave the motor runs without keying anything into it and it doesnt heat until the time is keyed in

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  • jc5320 Apr 22, 2008

    I have an microwave GE Model no--jvm1441bd003. when the door is closed the fan motor keeps running. and the panel goes blank.

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  • Microwave Ovens Master
  • 8,820 Answers

This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

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

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Posted on Apr 23, 2008

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Why does my microwave keep running/heating until I open the door? what can i do about it?


Sounds like a problem with the control panel. Further diagnostic testing would be required, however, as there can be other causes.

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I have a 10 year old MH7130XE Whirlpool microwave oven. The oven and key pad both work, and the oven heats just fine. The problem is the oven begins running as soon as you open the door...without pushing...


I'm assuming you mis-typed and meant the oven begins running when you SHUT the door and stops when you OPEN the door. Please tell me this is what you meant! If the microwave oven runs with the door open, UPLUG IT IMMEDIATELY AND DO NOT USE IT!!!

If the oven begins running without pushing the start button then the controller is bad or the Start button is worn out and making contact without pushing it. (Most likely it is your controller.) Generally, it is not worth the cost to replace the controller on a 10 year old microwave. Probably time for a new one.

But if you want, you can call Whirlpool and see what they suggest at 800-253-1301.

If this was helpful, please select YES to the first two RATINGS questions. Good Luck!

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The microwave functions properly but does not heat anything.


Check your door safety interlock switches ...

When the switches dont work, the oven doesnt know the door is closed so I will not turn the heat on. They fail because the door is opened while the oven is runnning.

The other main reason for no heat is a failed capacitor. Do not try to service this (silver can) until you understand the danger. LETHAL

Remove the cover, find the little switches on the side of the door away from the hinge.

If you need more help, you can (a) search this site for microwave no heat or (2) let me know and I will help you.

a

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Try this site - It has answers to almost anything that can go wrong with a microwave, I know I read something there almost identical to the problem you mentioned:
http://www.repairfaq.org/sam/micfaq.htm.

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Sharp Carousel Microwave R-1460A no power, door switch went first


You will want to replace the fuse and door switches. You will not be able to run it without replacing door switches. You do not need a new microwave. Door switches go bad, it has nothing to do with radiation.

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To replace the inner part of the latch is actually quite easy. Remove the glass tray from inside, then unplug the unit. Take to a flat surface and stand on edge so that the door will open flat. On the inside is a plastic trim that is just clipped on. Pop this off carefully and you will now see the assembly you need to replace. Note where the spring is anchored to the door before taking it apart. Put a small amount of lubricant on the guide pins of the new catch (petroleum jelly works great).

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Our Sharp Microwave Model R-508FS has just recently started doing some odd things. If you key in a time and press start, it may continue to microwave but the timer will not count down. Or, if you...


I believe I've solved the problem. I had tried the hard reset but then last night I thought about it and decided that since this house was built 22 years ago, I wondered if the electrician had used the short cut method on installing the sockets for electrical power. So, I measured the voltage at the adjoining socket while heating water. The voltage before turning on the microwave was 122.7 volts. After the microwave was turned on, it dropped down to 107.6 volts. I located the circuit breaker and shut it off and then pulled out the dual socket. Sure enough, they had used the time saving technique of stripping the wire back about 5/8 inch and then pressed it into the back of the socket. I figured it would be better with the microwave pulling 12 amps to just take the wire and wrap it around the screws on the side of the plug, tighten them down and then put it back in the box. Turned the circuit breaker back on and reset the clock on the microwave and did some more tests. No problems so far and when I measured the voltage drop, it went from 122.7 down to 119.7 running at full power. Don't remember the wire size but it was adequate. The only other thing I may try to eliminate any voltage drop would be to go to the master breaker box and tighten down the screw on the breaker going to that microwave outlet. I had tightened them all down in the whole 200 amp box a long time ago, but it probably wouldn't hurt to go thru the whole box again.

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1 Answer

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was there any motor that should run as you turn it on, the fan inside and the rotating table motor. try to replace that micro switch at the door that bubbled out and burnt. try to test or replaced right away the industrial diode that is connected from the capacitor to the ground of the microwave.

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Sounds like a classic bad door switch or switch holder. If you or a friend decide to work on it, we have *critical* safety info, info on door switch testing and replacement, and oven disassembly info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your base model number (without the suffix) here: http://tinyurl.com/gv383

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