Whirlpool Refrigerator: Clicking Sound from Back Panel... | appliancefaults.com

Technical Background:

Modern Whirlpool refrigerators utilize an MCU (Microcontroller Unit) to manage various functions, including defrost cycles, fan operation, and compressor control. Voltage paths supply power to these components, and a faulty component can trigger clicking sounds due to relay chatter, motor starting attempts, or electrical arcing.

Symptoms:

The homeowner observes a repetitive clicking sound emanating from the back panel area of the Whirlpool refrigerator, typically from the freezer section. The refrigerator may or may not be cooling effectively.

Possible Causes:

Defrost timer malfunction
Defrost heater relay stuck or failing
Condenser fan motor obstructed or failing
Evaporator fan motor iced up or failing
Start relay or overload protector failing
Compressor issue (less likely, but possible)

Solution:

1

Unplug the refrigerator from the 120V AC outlet.
2

Locate the back panel inside the freezer section. Remove the screws (typically 1/4-inch nut driver).
3

Inspect the evaporator fan for ice buildup. If iced, manually defrost with a hairdryer on low setting.
4

Access the defrost timer (location varies by model, often behind kickplate or in control panel). Test for continuity using a multimeter; replace if faulty.
5

Check the defrost heater element for continuity with a multimeter. A lack of continuity indicates a burned-out heater. Replace if needed.
6

Examine the condenser fan motor at the back of the unit. Ensure it spins freely and is not obstructed. Test voltage to the motor (typically 120V AC when the compressor is running). Replace if not receiving voltage or motor is bad.
7

If the clicking persists and other components are functional, a failing compressor is possible, requiring licensed technician evaluation and repair.

Safety Warning:

Disconnect power to the refrigerator before performing any diagnostic or repair procedures. Use proper Lock-Out/Tag-Out (LOTO) procedures to ensure the unit remains de-energized during work. Be aware of high voltage (120V AC) present in the electrical components.

Prevention:

Regularly clean the condenser coils (located at the back or bottom of the unit) with a vacuum cleaner brush attachment every 6 months. Ensure proper ventilation around the refrigerator to prevent overheating and strain on components. Avoid overloading the refrigerator, which can increase compressor run time and stress the system.

Expert Tip:

Some Whirlpool refrigerators have a diagnostic mode. Consult the service manual for your specific model, but a common sequence is pressing and holding the freezer and refrigerator temperature adjustment buttons simultaneously for several seconds. This can display error codes or initiate self-tests.

Frequently Asked Questions

•What is the correct defrost cycle time for my Whirlpool refrigerator model?

The defrost cycle time varies depending on the model. Consult the service manual or the manufacturer's website for the specific defrost cycle duration.

•How do I test the defrost thermostat?

The defrost thermostat should be tested for continuity when cold (below 40 degrees Fahrenheit). If it lacks continuity when cold, it is likely faulty and needs replacement.

•Where can I find the service manual for my specific Whirlpool refrigerator model?

You can typically find the service manual on the Whirlpool website by searching for your model number. Alternatively, appliance parts websites often have service manuals available for download.

Whirlpool Refrigerator: Clicking Sound from Back Panel Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct defrost cycle time for my Whirlpool refrigerator model?

•How do I test the defrost thermostat?

•Where can I find the service manual for my specific Whirlpool refrigerator model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: