I Have a GE Spacemaker over the stove microwave. I think it is 1000 watts. It's 7 years old. Everything works but it doesn't heat anything. There is 23 volts going to the fan unit in the center. What is probably wrong?

HELLO.

Since there is an amount of volts from the outlet, the fault is from the microwave breaker.

The solution is given below.

Reset the microwave breaker.

Take the back cover of the microwave off with a screwdriver.

Inside you will find a motor.

Most microwave motors have a small red reset button on them. Hit that button.

Your microwave should work again if the breaker was the issue.

Thanks