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Repair and disassembly guides for GE Microwave ovens.

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Fuse blows when door closes after replacing fuse.

My microwave went blank the other day. Replaced the fuse and everything came on, including the inside light even thought the door was closed. Able to set the clock like normal, placing it back in the wall then opening and closing the door, blows the fuse again. This microwave was serviced not too long ago and supposedly all the interlock switched were replaced. Any tips?

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Hi @donald1425 ,

What is the model number of the microwave?

Just wondering if fuse can be replaced with the door closed and then the power is applied to the microwave and the fuse doesn't blow but when the door is opened and closed again whether it is a loose wire (interlock switch?) touching the chassis due to the vibrations caused by closing the door and then blowing the fuse.

Have seen where a switch wire was accidentally jammed under the switch after it was replaced and the insulation was eventually cut through and it blew the fuse.

Worth a look for flashmarks on the inside body of the microwave anyway.

How long ago was it serviced? Most reputable repair services give some sort of time duration guarantee on their workmanship.

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Thanks for the tips. I have had all the switches replaced once, not too long ago. When I replaced the fuse everything was fine aside from the inside light on with the door closed. When the door is opened and then closed, that is when the fuse blows again. Your logic makes sense and is worth another look.

When the cover is off I see "burn marks" but opposite side of the interlock switches.

Again, your logic makes perfect sense since it is a mechanical action that blows the fuse and with the light on with door closed, for sure points to an interlock switch problem. The unit is GE Model JE2160WF01 - circa 2005.

It matches the oven below and of course no longer manufactured, don't mind buying a new one, but I like matching appliances. I do agree it is cheap interlock switch or wire most likely causing the issue. Home warranty people coming out on Tuesday morning, didn't want it to look like I messed around with it - but worth a try with you good advice.

Thanks very much!!!!

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OK. Tried the last suggestion. New fuse in, display works, inside light on, close door and fuse blows out with a flash, blowing out on side of the fuse completely. Last attempt, door open, new fuse, inside light on display waiting for clock reset. Remounted with door open, closed door, inside light on, display working, open door and close door, fuse blows. For sure an interlock switch issue. Wiring looks good on all interlocks switches. I'll let the home warranty people figure it out and replace the switch(es).

Thanks for your help!

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yes because I have replaced more than four fuses when its closed runs very well the problem starts when you open the door. burns the fuse sametime

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I had same problem - is related to interlock switch wiring. when u close the door that switch completes a safety circuit that engages the transformer and the magnetron. something in that path is shorting the ac hot leg to ground

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Donald Russell será eternamente grato(a).
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