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Anonymous Posted on Nov 15, 2017

GE PVM1870DMWW My microwave fan comes on every time the door is opened. The microwave works just fine it just that the fan runs with the door opened. When you shut the door it goes off. If you turn it on to cook something the fan works like it supposed to. It's just that when you open the door the fan always comes on. What do I need to fix it.

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zappal

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  • Microwave Ovens Expert 256 Answers
  • Posted on Nov 27, 2017
zappal
Microwave Ovens Expert
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Check those 3 micro switches in the door latch assembly

5 Related Answers

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Mar 11, 2007

SOURCE: KitchenAid KCMC155J

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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MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Dec 02, 2007

SOURCE: GE spacemaker Profile XL1800 vent fan will not shut off

It may be a bad door switch, a loose door switch mount, or a problem on the control panel, such as a sticky relay.

I would suspect a sticky relay first, but the door switches should be checked.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya: http://tinyurl.com/yzjozk

If you need your control panel assembly (smart board) repaired, we do that for $39.95 nationwide.

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

Anonymous

  • 706 Answers
  • Posted on Sep 01, 2008

SOURCE: Magnetron cooling fan

Are you sure it is the internal blower and not the VENT fan ?

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Jan 12, 2009

SOURCE: GE JVM1640WB

Your primary interlock (bottom door switch) is probably shorted, or its mount is damaged or misaligned, keeping it in the "on" position.

Even though a door switch clicks, it may still be bad inside.

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

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

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:.

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

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

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.

If you only need a switch, you can order a universal type here for $5 postpaid.

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

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Jan 23, 2009

SOURCE: GE microwave Turnable turns on opening the door

Thanks for the photo of the label!

It shows the FCC ID number, which I used to find schematics at the FCC Web site.

The problem is a shorted primary interlock switch.

This is the door switch which has two black wires connected to one terminal and a black and a blue wire connected to the other
terminal.

See these files for help:

http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

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

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.

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

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Verify the door micro switches.
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Hi.

Disconnect the oven from power and allow cooling down. Most GE have temperature controlled fan system.

The Fan is controlled by main pcb and powered along the line passing through the door lock switch, with circuit supplying power to the magnetron and turntable motor.

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If the top is open, the upper door switch should be open and the high voltage section should not be energized. That's the way it's *supposed* to work. But that buzzing is worrysome! Does the turntable turn during this condition? Does the inside light come on? How about the fan? If not, then I would doubt that it's cooking. If so, some models will do this. It's not uncommon to notice that the fan and light will try to come on for a split second when you shut the door. This would not indicate a problem. It has to do with the timing of the door switches and a replay on the board. If it's still under full warranty, it wouldn't hurt to call a GE-authorized servicer.
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