It quits heating after a couple minutes and sounds

check the air filter and cooling fan.

Actually, that's a feature! If you cook much on the range (stove) beneath the microwave, the heat will cause the microwave bottom to heat up quite a bit (just touch it!), and the microwave will turn on it's exhaust fan in an attempt to save itself from burning up. It will shut off in about 15 minutes after you turn off the source of heat.

If you need further help, reach me via phone at https://www.6ya.com/expert/ronald_e6b9572cebe3ad27

Try putting in a glass mug of water. Put the microwave on full power for two minutes. If the light comes on and everything looks like it should be heating the water, but at the end of the two minutes the water is cold or is only luke warm, then it looks like the device that generates the microwaves is not working. Check your warranty it could be two years or more for parts etc. If it is only a year then this could be an expensive repair. You might want to consider the cost of a new microwave against the originally cost of the current model and a repair. Or ask the repair shop for a quote.

This louder, 60 cycle hum is usually caused by a bad magnetron. The unit will not heat when this happens. Repair cost can exceed $100.

Hi,

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

Basic Microwave Oven Troubleshooting Tips

heatman101

[\[\]]

It is an Over the Range oven so absorbs the heat from the cooker and they are quite well insulated.

90 percent certain to be the magnetron

The unit was taken into a repair shop. The repairman said the magnetron shorted out and the unit failed. Fortunately, the unit had a 5 yr warrantee on the magnetron (1-yr on everything else). Total out of pocket costs are estimated at $65 to reinstall a new magnetron plus the aggravation of two weeks without a microwave. Those are pretty handy devices to be without!

When the microwave sounds okay, but there's no heat, one of the internal door switches, the high voltage circuitry, or the circuit board may have a problem. To resolve this problem, you need the assistance of a qualified appliance repair technician.
That said, you can get free estimates on the cost of a repair but you should also consider a replacement which may be a better option for you.

What they do not tell you about over the stove microwaves is that they are constantly deteriorating due to the steam, oil, and other cooking fumes from the stove below. As a result, their life expectancy is definitely diminished.

If it fails again, please reply back to this thread. Good luck!