20 Most Recent Jenn-Air JMC8127DD Microwave Oven Questions & Answers

Be advised that they are heavy. You may need 2 people to check this. The bracket may have a lip on the wall section that you have to take the weight off of to move it.

Jenn-Air... | Answered on Dec 17, 2017

Highly likely your microwave has "failed".
Down inside the microwave is a part called the Magnetron. This is the part, (about the size of your fist), that makes the sound waves to cook the food.
On some models, it can fail, whilst all the other stuff works.
3 possibilities:
1) You need a fuse replaced.
2) You need a capacitor replaced (That part "starts" the magnetron) or
3) you need a new magentron.
In any regard, very often people will not opt to have it repaired, because the labor & parts can cost more than a new Microwave.
God bless your efforts.

Jenn-Air... | Answered on Sep 08, 2017

Heating element or capacitor fuse

Jenn-Air... | Answered on Sep 04, 2017

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips


Jenn-Air... | Answered on Feb 08, 2015

Please put out the cover of the micro wave and joint the control panel wire perfectly.

Jenn-Air... | Answered on Oct 02, 2013

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.

Jenn-Air... | Answered on May 23, 2013

Normally you have to separate the door panels (as shown in the attached photo) and then you'll see the previously hidden screw(s) you need to remove.

Or you can watch a YouTube video (not a video I made) that demonstrates how it's done.

In some cases, you then have to gently rotate the handle to unlock it.

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

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

Jenn-Air... | Answered on Nov 17, 2012

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

Jenn-Air... | Answered on Aug 24, 2012

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

Jenn-Air... | Answered on Aug 12, 2012

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"

Jenn-Air... | Answered on Apr 17, 2012

To remove the bulb you will have to remove the cabinet of the microwave to replace the bulb and its mounted inside next to the tube area by two screws. The lamp is inside the top.


Now to disassemble the body cabinet, you will require the disassembly diagram. To get disassembly diagram please click on this link below: ---



With the help of this disassembly diagram you will take apart the cabinet, now to remove the lamp you will require internal parts disassembly and location of lamp. To see where the lamp is located. Click this link directly and in the diagram part number 2 is lamp:----



This disassembly diagram will help you to remove the bulb.

To order new bulb, please click on the link below: ---


This will help. Thanks. Helpmech.

Jenn-Air... | Answered on Nov 28, 2011

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

Jenn-Air... | Answered on Nov 28, 2011

Hello, welcome to FixYa.

I understand you have a Jenn Air over the range (OTR) microwave, correct ? I can tell you on most microwaves with these symptoms you're dealing with a bad control or a faulty secondary switch, (if you check your diagram you should see three or more door switches...typically 3).

Before going too far though, if you could double check the model number and confirm it is indeed JennAir, I'd be better equipped and most certainly able to help without generalizing...the info above appears to be only partial.

Also anything further you can add will help in a speedy solution. Can you elaborate on what you've done to "check the lock" ? Does the unit make any sound when the start is pressed ? A click ? Or do the digits in the display just count down without any other function...other than what you stated regarding the interior light ?

I can guide you on accessing these switches, controls etc. or changing them, but I'll need to clarify the model as I mentioned before going forward.

I will watch for your post and I'll continue to help in any manner I can. Good luck


Macmarkus :)

Jenn-Air... | Answered on Sep 09, 2011

you can get a new light from www.firstlightdirect.com

Jenn-Air... | Answered on Jul 03, 2010

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