GE Advantium Microwave Loud Grinding Noise During... | appliancefaults.com

Technical Background:

The Advantium uses a Magnetron Control Unit (MCU) to manage the power to the magnetron and convection heating elements. During convection bake, the MCU activates both the convection fan motor and the heating element. The convection fan circulates hot air for even cooking. The 120V AC voltage paths to these components are controlled by relays on the MCU board.

Symptoms:

The US homeowner reports a loud grinding noise specifically during the convection bake cycle of their GE Advantium microwave oven. This noise is not present during standard microwave operation.

Possible Causes:

Convection fan motor failure
Blower wheel obstruction or damage
Turntable motor malfunction
Waveguide cover interference
Magnetron arcing (less likely, but possible)

Solution:

1

Disconnect the Advantium microwave from the 120V AC power outlet.
2

Remove the outer cabinet using a 1/4-inch nut driver.
3

Inspect the convection fan motor and blower wheel for obstructions or damage. Check for loose screws or debris.
4

Test the convection fan motor windings for continuity using a multimeter. Expected resistance is typically between 20-50 ohms.
5

Check the turntable motor operation and listen for unusual noises. If faulty, replace the turntable motor.
6

Examine the waveguide cover (usually made of mica) for burn marks or damage. Replace if necessary.
7

If magnetron arcing is suspected (burning smell), carefully inspect the magnetron area for damage. This repair is best left to a qualified technician due to high voltage risks.

Safety Warning:

Always disconnect power before servicing. The Advantium microwave contains high voltage components that can cause serious injury or death. Lock Out/Tag Out (LOTO) procedures should be followed. Capacitors can retain a dangerous charge even after disconnection.

Prevention:

Regularly clean the interior of the Advantium, especially the area around the convection fan. Ensure proper ventilation to prevent overheating of the convection fan motor. Avoid using metal cookware during convection bake mode unless specifically approved by GE.

Expert Tip:

Some GE Advantium models have a service mode. To access it, simultaneously press and hold the 'Clock' and 'Timer' buttons for 3 seconds. This mode allows for diagnostic testing of various components, including the convection fan motor.

Frequently Asked Questions

•What is the correct resistance reading for the convection fan motor windings?

The typical resistance reading for a functioning convection fan motor winding is between 20-50 ohms. An open circuit indicates a failed motor, while a reading significantly lower than 20 ohms may indicate a shorted winding.

•How do I safely discharge the capacitor in the microwave?

Discharging a capacitor requires extreme caution. The safest method is to use a high-wattage resistor (e.g., 20,000-ohm, 5-watt) connected to insulated test leads. After disconnecting power and waiting several minutes, carefully connect the test leads across the capacitor terminals for several seconds. Verify discharge with a voltmeter. However, it's highly recommended that only qualified technicians handle this procedure.

•Where can I find a replacement waveguide cover for my GE Advantium?

Replacement waveguide covers are readily available online from appliance parts retailers such as AppliancePartsPros.com, RepairClinic.com, and Sears PartsDirect. Be sure to specify the exact model number of your GE Advantium to ensure you order the correct part.

GE Advantium Microwave Loud Grinding Noise During Convection Bake: Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct resistance reading for the convection fan motor windings?

•How do I safely discharge the capacitor in the microwave?

•Where can I find a replacement waveguide cover for my GE Advantium?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: