Admiral Microwave Turntable Grinding Noise or Not... | appliancefaults.com

Technical Background:

The microwave control unit (MCU) sends a low voltage AC signal to the turntable motor when the microwave is operating. This voltage passes through door interlock switches for safety. If the motor is faulty or the voltage path is interrupted, the turntable won't spin. The drive coupler connects the motor to the turntable, transmitting rotational force.

Symptoms:

The Admiral microwave turntable either makes a loud grinding noise during operation or fails to rotate at all. Food may cook unevenly due to the lack of rotation.

Possible Causes:

Turntable motor failure
Drive coupler damage
Turntable support roller issues
Waveguide cover interference
Debris accumulation under the turntable
Faulty door switch (intermittent operation)

Solution:

1

Unplug the microwave from the 120V AC outlet.
2

Remove the turntable and turntable support.
3

Visually inspect the drive coupler for cracks or damage. Replace if needed.
4

Check the turntable motor for proper voltage (typically 21V AC) using a multimeter. If no voltage, troubleshoot the control board or door switches.
5

If voltage is present, replace the turntable motor.
6

Examine the waveguide cover for damage or arcing. Replace if necessary.
7

Clean any debris from the microwave cavity and under the turntable support.

Safety Warning:

Always unplug the microwave before performing any repairs. Microwaves contain high voltage components that can be lethal even when unplugged. If you are not comfortable working with electrical appliances, consult a qualified technician. Lock Out/Tag Out (LOTO) procedures should be followed. Capacitors can store dangerous voltages.

Prevention:

Regularly clean the microwave interior to prevent food buildup. Avoid placing excessive weight on the turntable. Gently rotate the turntable manually to check for any resistance.

Expert Tip:

To quickly test the turntable motor, carefully disconnect the wires and apply 21V AC directly to the motor. This will confirm if the motor itself is the issue. Check the continuity of the door switches with a multimeter to rule them out as a potential cause.

Frequently Asked Questions

•How do I access the turntable motor?

You'll typically need to remove the microwave's outer cabinet. This usually involves removing screws from the back and sides. Be extremely careful when handling the cabinet panels as edges can be sharp.

•What if the motor has voltage, but it's still not spinning?

If the motor is receiving the correct voltage but isn't spinning, the motor is likely internally damaged and needs replacement. Check the motor's resistance with a multimeter. An open or shorted motor indicates failure.

•How can I check the door interlock switches?

Unplug the microwave and locate the door switches (usually near the door latch mechanism). Use a multimeter set to continuity mode. When the door is closed, the switches should show continuity. When the door is open, they should show no continuity. Replace any faulty switches.

Admiral Microwave Turntable Grinding Noise or Not Spinning: Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the turntable motor?

•What if the motor has voltage, but it's still not spinning?

•How can I check the door interlock switches?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: