The microwave oven does not heat up when operated.. :(

Hi Marc, there is no 'heat' per say with microwave ovens as one would find in a convection oven. Microwave ovens operate by generating electromagnetic fields (within the microwave band) that causes water molecules in the food item to vibrate/rotate creating friction/heat - within the food item as opposed to the surrounding space (this would be convection)

There are three microswitches
When checking a microwave oven that seems to operate properly yet does not heat first check for 110VAC at the primary of the large transformer.

The problem is in the magnetron the heart of the system, or the inverter board, if microwave oven is 7 years old or less.

A defective diode or magnetron can cause the oven to sound differently and not to cook.

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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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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maytag microwave model # mmv4184aaq operates normally but will not heat food or water

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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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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The High Power Transformer (Magnetron) fuse is wrong. Replace it. It will work perfect... The fuse is always hidden in a plastic case fixed at the bottom of the microwave near the big capacitor... My email: [email protected]