The microwave part of GE profile JVM1190 microwave/convection oven stopped working. I've tried the unplug reset, nothing. The convection part works fine. When using the microwave function, it appears to be working but there is no heating.

Ck here....

https://www.appliancepartspros.com/repair-help/general-electric-microwave-pvm1790sr1ss-repair/pvm1790sr1ss-wont-start.html

But before throwing parts at it give them a call #877#.

I'm NOT affilated with them.

Best to you.

Convection needs fan drive to force the air into the oven cavity. The fan may be direct motor drive or belt driven. If the latter the belt may be broken or simply have stretched and come off.
Before removing the cover of the oven in attempt to carry out any maintenance such as replacing the Oven cavity lamp, make sure the oven is disconnected from the power point ! The voltages in a microwave oven ARE LETHAL !

Go to this link Download GE JVM1190 Owner Manual

Look for the area on the page that looks like this (see below)
In the empty box, type the 3 characters that are requested
(sample HAF)
Then click on the blue rectangle that says "GET MANUAL"
Once the manual downloads,click on the file to open it.

GE JVM1190 825 Watts With Convection Cook Microwave Oven. 1.1 Cu.ft. 825 Watts output power

I assume you've referred to your owner's manual to be sure you are operating the convection properly?

If for some reason you don't still have your owner's manual, you can get it here. See the tips on page page 30.

You can also do a hard reset by unplugging the oven for a couple of minutes, plugging it back in, then setting the clock and trying again.

If it's still not working, you may have a bad sensor or other problem.

open the screw and then full out the side and top cover

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

Microwave Oven Basic Troubleshooting Tips
http://www.fixya.com/support/r5508031-microwave_oven_basic_troubleshooting

heatman101

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101
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You have a blown actuator. This is the device that creates the microwaves that cook the food. The cost of one of these will be as much as a new unit.

It is not your key panel, but the magnetron inside the microwave that is causing you the problem. The reason it does not short out on defrost or convection is because it is not drawing as much current through the magnetron to short out.