Whirlpool Refrigerator: Clicking Sound, Thermostat Relay... | appliancefaults.com

Technical Background:

The refrigerator's Main Control Unit (MCU) sends a signal to the start relay to initiate compressor operation. The start relay provides an initial surge of power to the compressor motor. The overload protector safeguards the compressor from overheating by interrupting power if excessive current is detected. A faulty thermostat can also prevent the compressor from running. Voltage paths typically involve 120V AC from the breaker panel to the thermostat, then to the relay and compressor.

Symptoms:

The homeowner reports a clicking sound coming from the back of the refrigerator, specifically from the compressor area. The refrigerator may not be cooling properly, or the compressor may be cycling on and off frequently.

Possible Causes:

Failed start relay
Compressor overload protector tripping
Faulty thermostat
Wiring harness issue near the compressor or relay
Compressor internal fault

Solution:

1

Unplug the refrigerator from the outlet.
2

Locate the compressor compartment at the back of the refrigerator. Remove the access panel using a 1/4-inch nut driver.
3

Visually inspect the start relay and overload protector for any signs of burning or damage.
4

Using a multimeter, test the start relay for continuity. A lack of continuity indicates a faulty relay.
5

Test the overload protector for continuity. An open circuit indicates a failed overload protector.
6

Check the voltage to the compressor using a multimeter while the refrigerator is attempting to start. You should see 120V AC.
7

If the start relay or overload protector is faulty, replace it with a new one. Ensure the replacement is compatible with your Whirlpool refrigerator model.

Safety Warning:

Always disconnect the refrigerator from the power supply before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures to prevent accidental energization. Be aware of high voltage present in the compressor compartment. Wear appropriate safety glasses and gloves.

Prevention:

Regularly clean the condenser coils (located at the back or bottom of the refrigerator) using a vacuum cleaner with a brush attachment. This improves airflow and reduces compressor workload, preventing overheating. Ensure the refrigerator is not overcrowded, allowing for proper air circulation.

Expert Tip:

Whirlpool refrigerators often have a service mode accessible through a specific button sequence on the control panel. Entering service mode allows you to run diagnostic tests on the compressor and other components. Consult the service manual for your specific model for the correct sequence.

Follow-up Questions:

Frequently Asked Questions

•How do I determine the correct replacement start relay for my Whirlpool refrigerator?

Locate the model number of your refrigerator. You can usually find it on a sticker inside the refrigerator compartment. Use this model number to search for compatible start relays online or at an appliance parts supplier.

•What should I do if the compressor is hot to the touch?

If the compressor is excessively hot, it's likely overheating. This could be due to a clogged condenser, a faulty start relay, or an internal compressor problem. Unplug the refrigerator and allow the compressor to cool down completely before attempting any further troubleshooting. Check the condenser coils for cleanliness. If the issue persists, the compressor may need to be replaced.

•How do I check the thermostat on my refrigerator?

The thermostat controls the temperature inside the refrigerator. You can test it for continuity using a multimeter. Remove the thermostat from the refrigerator and set it to the coldest setting. Check for continuity between the terminals. If there is no continuity, the thermostat is likely faulty and needs to be replaced.

Whirlpool Refrigerator: Clicking Sound, Thermostat Relay Failure Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I determine the correct replacement start relay for my Whirlpool refrigerator?

•What should I do if the compressor is hot to the touch?

•How do I check the thermostat on my refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: