How to Check the Carousel Tray Motor In a Microwave Oven

Disconnect the power from your microwave. Pull the microwave out if it’s next to a wall or inside a cabinet.

Open the microwave door and remove the carousel along with the carousel turning apparatus. The apparatus typically lifts up with a gentle tug.

Turn the microwave over to expose the cover that protects the carousel motor. Remove the retaining screws and lift up the cover to see the carousel motor. Two screws typically keep the motor in place.

Remove the screws to remove the motor from the microwave. Two wires still connect to the motor. To check for physical damage to the motor, leave the wires connected and inspect the motor. Typically, the only kind of physical damage you'll encounter is a bent prong and that usually only occurs if the microwave was mishandled or dropped.

Prepare the motor for a continuity test by disconnecting the wires. Turn on the multimeter and set the reading to the lowest ohms of resistance. Touch the multimeter probes to the metal prongs on the carousel motor. If the multimeter reads "0," then the motor has continuity. If the multimeter does not read "0," then the motor does not have continuity and you must replace it.