Microwave will not stop cooking unless I open door

Step 1:

Door Switch

If the microwave runs for a few seconds and then shuts off, a door switch might have failed intermittently. Check each of the door switches for any signs of overheating, arcing, or burning. Also check each of them for continuity. Replace any of the switches that is visibly damaged or that only has continuity intermittently

Step 2:

Main Control Board

If the microwave runs for a few seconds and stops there may be a short circuit in the main control board. Check other components first, these boards are often misdiagnosed.

Touchpad and Control Panel

If the microwave runs for a few seconds and stops the touchpad and control panel might be defective. There are several other components that can cause this problem, be sure to check any other components before replacing this board.

Touchpad

If the microwave runs for a few seconds and stops the touchpad might be at fault. This is not common. Generally speaking, if the microwave display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.

High Voltage Transformer

If the microwave runs for a few seconds and stops the high voltage transformer might have an intermittent short. This is not common. Check other components related to the microwave symptom first.

Thermostat

If the microwave runs for a few seconds and stops the thermostat might be defective. Watch our video on testing thermostat

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use the DVOM tester and fix it. God bless you

The magnetron is more than likely the problem, or the inverter board if oven is 7 years old or less. If you have a digital meter you can do a rough test on the magnetron, unplug microwave, set meter to ohms, disconnect one wire from magnetron and put the test leads across too points, if reading is .2ohms or less it is good, but if the test shows infinity or open the magnetron is bad, keep in mind it may have a short making the reading misleading.

Did you have a power failure? Could be an overheat situation. Try unplugging the unit, wait 30 seconds and plug it in again. This resets the unit as long as there isn't a breaker or fuse blown. If it is a power issue, the display should start flashing. Did you get any error codes?

Your Use and Care Manual:

http://shop.amana.com/assets/pdfs/literature/C8940825S.PDF

No! But it will need to be repaired. Did you wrap the potatoes in tin foil? The reason for the smoke needs to be found and repaired. Smoking means a short or a part shorted, failed, or wires touching another wire that did not blow any fuss.That is not good.
Trained technicians can help the mfg improve their products if they find the problem and report it to the Mfg.
LOL

These microwaves are designed to run the fan for a couple mins after the cook cycle to continue cooling the electrical components.

You can download the owner's manual here free.

If it needs work or a new charcoal filter, etc., you can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

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

Check for another fuse. Check all electrical connections for burns. Did you check fuse with a meter or just look at it? Don't trust what it looks like.

It's one of the micro-switches (3) that are part of the interlocking safety circuit. I actually took my switch apart and fixed it, but 99% of those out there would (and should) replace the switch.

My amana micro just went dead. No lights nothing ,almost like a fuse blew.Its an over the stove model . The outlet works fine.#mvh210w