Question about Jenn-Air JMC8127DD Microwave Oven

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Jenn-Air JMC8127DD Microwave Oven no power but oven works

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9085 Answers

SOURCE: Jenn-Air JMC7000 Microwave Stopped working

So it's dead? (No display, no inside lights, no beeps?)

A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the thermostat to open. When it cools, it closes the circuit and allows power through again.

If it's random, it may be a bad connection, usually on the control board or fuse holder.

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 the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site, linked 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 write back with more details if you need further help.

We appreciate your thoughtful rating of our answer.

Posted on Nov 18, 2007

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  • 5 Answers

SOURCE: jenn-air microwave JMC 7000 ADB has no power

I have a different Jenn-Air built in microwave & oven combination but I'm sure my solution will work for you as well.

My microwave was plugged into an outlet located on the top of the oven. This outlet has a "circuit breaker" that tripped while we were using the self cleaning feature on the oven. You just need to reset the breaker button right next to the wall oven outlet. Why it tripped is a mystery since the microwave was not in use at the time. Bad design.

Of course, getting to the reset button is your only challenge. You need to pull the microwave and oven out of the wall/cabinetry in order to get to it. The unit is heavy so you will need help. Or, call a certified repairman and they should be able to do this for you in 30 minutes or less so the service call should not run you more than @$85 if it is no longer under warranty.

I would also suggest you contact Jenn-Air to complain about this issue and seek reimbursement from them if necessary.

Posted on Jan 04, 2008

  • 5 Answers

SOURCE: No power on Jenn-Air JMC 7000 ADB Microwave

I have a different Jenn-Air built in microwave & oven combination but I'm sure my solution will work for you as well.

My microwave was plugged into an outlet located on the top of the oven. This outlet has a "circuit breaker" that tripped while we were using the self cleaning feature on the oven. You just need to reset the breaker button right next to the wall oven outlet. Why it tripped is a mystery since the microwave was not in use at the time. Bad design.

Of course, getting to the reset button is your only challenge. You need to pull the microwave and oven out of the wall/cabinetry in order to get to it. The unit is heavy so you will need help. Or, call a certified repairman and they should be able to do this for you in 30 minutes or less so the service call should not run you more than @$85 if it is no longer under warranty.

I would also suggest you contact Jenn-Air to complain about this issue and seek reimbursement from them if necessary.

Posted on Jan 04, 2008

  • 1 Answer

SOURCE: Jenn-Air Microwave - no power

Had the same problem. Removed the unit (snapping off the upper and lower trim rings was a chore but they do snap off) and tested the power. Plug behind the unit was good. Pulled the cover and checked the thermal fuse with ohm meter. No good. Replaced fuse, microwave would run for a second, then light goes dim and it buzzes, then it blew the fuse. Per above suspected Capacitor. Changed that, and we are back up and running. Thanks!!

Posted on Sep 27, 2008

  • 3 Answers

SOURCE: Jenn-Air JMC7000 Microwave stop working

I have the same unit and age the JMC7000 everything appeared normal on the display and countdown etc...But it would not heat,I trouble shooted the problem and discovered it was a faulty door switch I replaced it and it works like new again.I ordered the part from www.repairclinic.com it's an easy fix.and costs a few bucks...

Posted on Feb 06, 2009

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1 Answer

How to remove JMC8127DD from cabinet


The wiring diagram for the microwave shows it is separate and distinct.
Usually slid-in counter top microwaves in this cubbyhole configuration have a trim piece surrounding & covering the front edges of the oven on all sides like a picture frame.
Normally you remove 4 or more screws in the trim frame, pull the frame off, then slide the oven out a little (there may be a locking tab on the cubbyhole's rails for safety) to unplug the cord, and then slide it out the rest of the way.
You can find installation instructions and other literature for this model for free download here.
You can find links to helpful exploded view diagrams and order parts and accessories for it here.

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Could be, sound more like the oven thermostat is bad-easily fix actually

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open circuit switch when power reaches this switch it will shut down as switch is us

Aug 12, 2012 | Jenn-Air JMC8127DD Microwave Oven

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Where is the high voltage fuse on a microwave


The thermal fuse monitors the magnetron temperature and cuts power, if it gets to hot and resets in no more than 20 to 30 minutes. Unplug microwave oven, remove top, "several screws" look over to the right, thermal fuse is mounted on top on the inner chassis, "round and thick with 2 wires clipped on"

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I have the same problem... I'll let you know if I find a solution. philstein@cox.net

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press step clear then hold 0

Sep 20, 2008 | Jenn-Air JMC8127DD Microwave Oven

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