GE Monogram Refrigerator: Grinding Noise from Evaporator... | appliancefaults.com

Technical Background:

The GE Monogram refrigerator utilizes a Main Control Unit (MCU) to manage various functions, including the evaporator fan motor. The MCU receives temperature sensor data and regulates the fan speed via a DC voltage signal. This voltage powers the evaporator fan motor which circulates cold air throughout the freezer and refrigerator compartments. A thermistor provides feedback to the MCU, enabling efficient cooling. Voltage paths for the fan motor are often fused to protect the motor and control board.

Symptoms:

The US homeowner reports a grinding noise coming from inside the freezer compartment of their GE Monogram refrigerator. The noise is intermittent but noticeable, especially when the refrigerator is actively cooling.

Possible Causes:

Worn evaporator fan motor bearings.
Ice buildup obstructing the fan blades.
Debris lodged in the fan assembly.
Loose fan blade on the motor shaft.
Faulty evaporator fan motor control board.

Solution:

1

Disconnect the refrigerator from the power source at the breaker panel (LOTO). Verify 0V AC at the outlet with a multimeter.
2

Remove the evaporator cover inside the freezer compartment using a 1/4-inch nut driver. Note the location of screws.
3

Inspect the evaporator fan for ice buildup or any visible obstructions. Defrost the ice with a heat gun (low setting) or hairdryer.
4

Check the fan blade for looseness on the motor shaft. Tighten if possible, or replace the fan blade if damaged.
5

Test the evaporator fan motor windings for continuity using a multimeter. Replace the motor if open or shorted.
6

If the motor is good, check the voltage at the fan motor connector during operation (typically 12V DC). If no voltage, the motor control board may be faulty. Replace the board.
7

Reassemble the evaporator cover and restore power to the refrigerator.

Safety Warning:

Always disconnect the power supply at the breaker panel (Lock Out, Tag Out) before performing any repairs. The refrigerator contains high voltage components that can cause serious injury or death. Wear safety glasses and gloves.

Prevention:

Regularly check the freezer compartment for ice buildup and manually defrost the refrigerator every 6 months to prevent excessive ice accumulation around the evaporator fan. Ensure proper door seals to minimize moisture entry.

Expert Tip:

Some GE Monogram models have a service mode that allows you to manually activate the evaporator fan for testing. Consult the service manual for the specific key sequence to enter service mode.

Frequently Asked Questions

•How do I test the evaporator fan motor for continuity?

Disconnect the fan motor from the wiring harness. Set your multimeter to the ohms setting. Place the probes on the motor's terminals. A reading close to zero ohms indicates continuity. An open circuit (OL) indicates a faulty motor.

•Where is the evaporator fan motor control board located on my GE Monogram refrigerator?

The evaporator fan motor control board is typically located in the upper rear section of the refrigerator, often behind an access panel. Refer to your unit's specific wiring diagram to identify its exact location.

•What type of lubricant should I use on the evaporator fan motor bearings?

Do not lubricate sealed fan motor bearings. If the motor has oil ports, use a few drops of lightweight electric motor oil (SAE 20) only.

GE Monogram Refrigerator: Grinding Noise from Evaporator Fan - Repair Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I test the evaporator fan motor for continuity?

•Where is the evaporator fan motor control board located on my GE Monogram refrigerator?

•What type of lubricant should I use on the evaporator fan motor bearings?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: