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Posted on Apr 13, 2008
Answered by a Fixya Expert

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Microwave oven runs with door open

The microwave runs with the door open. Goes off as usual when the door is closed, but when door is opened the light goes on and the turntable rotates. We don't know if the microwaves are activated when this happens. The oven works normally when door is closed and time/power are programmed in. It stops at the end of program, but when you open the door, it comes back on.

  • TDGooldy Dec 15, 2008

    I have the same problem with a GE Spacemaker XL1800. I talked to GE and there are two door switches. Which one is likely to be causing this problem and should be replaced on this, the primary or secondary?

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1 Answer

William Miller

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  • Microwave Ovens Master 9,179 Answers
  • Posted on Apr 18, 2008
William Miller
Microwave Ovens Master
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This is usually caused by either a bad door switch, a loose door switch mount.

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 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

Please feel free to contact me directly if you need more help.

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

William E. Miller, AS-EET
[email protected]
http://www.microwavedisplay.com

2 Related Answers

Anonymous

  • 180 Answers
  • Posted on May 30, 2009

SOURCE: sharp R-1871 microwave/convection oven. Microwave will not work

This may be due to the microwave section not working. Check the high voltage diode if it is ok, replace the Magneton.

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Anonymous

  • 1768 Answers
  • Posted on Mar 13, 2010

SOURCE: Frigidaire FMT 148GP Microwave oven. Turntable

1. the motor to rotate the glass table in the micro wave may have stop working or the switch to the motor is defective.

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Related Questions:

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1answer

Troubleshooting- microwave turntable and fan run constantly when door closed, door switches test good, timer can be set and oven runs otherwise; need amana microwave ACM1580AS wiring diagram

I'd look for a defective relay or shorted triac on the control panel circuit board. Either could cause this problem.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

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Microwave makes noise after door is opened jenn air model jmv9169ba

Microwave ovens emit powerful radio waves and in general for safety reason should only be used when in perfect working order. It usually costs more to repair an older microwave oven than to simply replace it.
Suggest buy a new one.
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Microwave keeps running with door open

I'd say the door interlock switch has failed, and supplies a connection when it should not. Microwave ovens can be dangerous to anyone poking around inside, even when unplugged, so get a quote from a service tech. You might find that parts+labour is almost as much as a new one.

Microwave radiation being released through an open door is also a hazard, as it is known to cause eye cataracts, so don't get near if the oven does this.
1helpful
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Jennair Microwave Shuts Off after 3 seconds

This is usually a defective or loose bottom door switch or that switch's mount is loose, misaligned or broken.
It's usually caused by opening the door while it's cooking instead of hitting "stop" first) or slamming the door or both.
My help file on door switches is here.
0helpful
2answers

Fan runs when microwave door opened

-You're already answer yourself.


Good luck


Mai
0helpful
1answer

Fan continuously runs, have to leave door open

Check the door switches with digital meter, usually find one bad one. Set meter to ohms and test, some will be normally open and others closed, check with the door open and closed.
0helpful
2answers

Ge jvm1540 no power..piece of ****?

(Fuse is a ceramic fast blow 20A Little Fuse 0314020 or Eton ABC-20) Melting I²t 631
If the Fuse blows when the door is opened. (not even energizing the microwave) The bottom micro switch (monitor micro switch) is normally closed, (open when the door is closed) however if it remains in the closed state when the door is open you will have a short circuit with the Primary Micro switch. The circuit diagram shows that one of the two switches must be open. I was able to test with an ohm meter. With a bad switch the reading was less than an ohm with the door open and 290 ohms with the door closed - Across the plug with a good fuse. With the new micro switch the resistance shouldn't change by much with the door open or closed.

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2helpful
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Every time I open the door to the microwave, it goes on automatically. Even if I press the button on the door, the microwave goes on. Should I just buy a new one, or is it an easy fix?

most likely the door latch assembly and or the door switch has failed... there are approx. 3 micro switches located where the door closes... these switches all operate items such as the cooling fan,timer, clock assembly etc... sounds like one of these micr switches have failed and will require getting inside to exam with a meter and check contuinity on close and open when switch is open...good luck to you...
4helpful
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Blown Fuse

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
0helpful
1answer

It works even if I open or close the door.

if thats a microwave.. then the sensor of the closed door is broken.. thats why it worked even when open.. and that is really dangerous...
so.. your best bet would be opening it and find the broken thing that tells the microwave when its closed...

that thing is usually the little secures attach to close the oven..

if its not a microwave, the problem might still be something similar to this..
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