Whirlpool Refrigerator Loud Rattling Noise: Fan... | appliancefaults.com

Technical Background:

Whirlpool refrigerators use a Main Control Unit (MCU) to regulate compressor, fan, and defrost cycles. The MCU sends 12V DC signals to the evaporator and condenser fan motors based on temperature sensor readings. Incorrect voltage or motor failure can cause unusual noises.

Symptoms:

US homeowner observes a loud rattling noise coming from their Whirlpool refrigerator, describing it as similar to a loose screw in a fan.

Possible Causes:

Loose fan blade on the evaporator fan motor shaft.
Ice buildup interfering with the evaporator fan.
Faulty evaporator fan motor bearings.
Debris or foreign object lodged in the condenser fan blades.
Loose mounting screws on the condenser fan motor or evaporator fan motor.
Worn or damaged fan blade itself.

Solution:

1

Unplug the refrigerator from the 120V AC outlet and engage Lock Out Tag Out (LOTO) procedures.
2

Access the evaporator fan (usually behind an interior panel in the freezer compartment). Remove the panel using a 1/4-inch nut driver.
3

Inspect the fan for ice buildup. If present, defrost the freezer completely using a hairdryer on low setting. DO NOT use sharp objects to chip away ice.
4

Manually rotate the fan blade. If it feels rough or makes noise, the motor bearings may be failing. Check the evaporator fan motor voltage with a multimeter. You should read around 12V DC.
5

Access the condenser fan at the back of the refrigerator. Visually inspect for any debris or obstructions. Remove debris.
6

Tighten any loose mounting screws on both the evaporator and condenser fan motors using a 5/16-inch socket or nut driver.
7

If the noise persists after these steps, the evaporator or condenser fan motor likely needs replacement. Replace with a new OEM part.

Safety Warning:

Always disconnect power (LOTO) before working on any electrical appliance. The refrigerator operates on 120V AC and contains components that can cause electric shock. Do not touch any wires or components with wet hands.

Prevention:

Regularly clean the condenser coils at the back of the refrigerator (every 6 months) to ensure proper airflow and prevent the condenser fan motor from overworking. Ensure proper door seals to minimize frost buildup.

Expert Tip:

Many Whirlpool refrigerators have a diagnostic mode accessible through a specific button sequence. Entering this mode allows you to manually activate components like the fans for testing purposes. Check the tech sheet behind the kick plate for the exact sequence for your model. Often it involves pressing and holding certain buttons simultaneously, such as Freezer Down and Refrigerator Up, for 3-5 seconds.

Frequently Asked Questions

•How do I access the evaporator fan in my Whirlpool refrigerator?

The evaporator fan is typically located behind a panel inside the freezer compartment. You'll need to remove the shelves and any ice maker components. Then, unscrew the panel using a 1/4-inch nut driver to access the fan.

•What voltage should I expect to see at the evaporator fan motor connector?

You should expect to see approximately 12V DC at the evaporator fan motor connector when the refrigerator is calling for the fan to run. Use a multimeter to verify this voltage.

•Where can I find the tech sheet for my Whirlpool refrigerator?

The tech sheet is usually located behind the kick plate at the bottom front of the refrigerator. It may be folded up or taped to the inside of the kick plate.

Whirlpool Refrigerator Loud Rattling Noise: Fan Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the evaporator fan in my Whirlpool refrigerator?

•What voltage should I expect to see at the evaporator fan motor connector?

•Where can I find the tech sheet for my Whirlpool refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: