Kenmore Microwave Not Heating Up Food

How to test microwave magnetron with a multimeter.

Kenmore microwave not heating up food.

A new and better video update for the previous one where i explain how to fix your microwave that works but doesn t heat. The diode converts the a c power output of the transformer to d c doubling the voltage to nearly 5 000 volts. If the diode burns out the magnetron won t receive enough voltage to operate preventing the microwave. If it is broken it may blow a fuse in your microwave which could lead to other components failing.

Br i have a kenmore microwave 790 83337710. A microwave that does not heat up may have a broken magnetron. If the microwave doesn t heat or it heats more slowly than it should this indicates that it is. My kenmore microwave is not heating.

Lights timer display all work. When i push start it sounds like it working but the turntable doesn t move and it doesn t heat. When the diode fails it is often visibly burned out. If the diode burns out the magnetron won t receive enough voltage to operate preventing the microwave from heating.

Once the voltage is normal the microwave oven will start to work fine. When the voltage drops below 215 volts the microwave does not heat the food well enough. If the voltage is normal then it s time to replace the magnetron with a new one. The diode converts the a c power output of the transformer to d c doubling the voltage to nearly 5 000 volts.

This high voltage powers the magnetron to heat the food. This is the part that makes the heat to cook the food.