Whirlpool Refrigerator: Clicking Sound from Bottom -... | appliancefaults.com

Technical Background:

The start relay and capacitor work together to provide the initial boost needed to start the compressor motor. The start relay momentarily energizes the start winding of the compressor, while the capacitor provides a temporary voltage boost. Once the compressor is running, the start relay de-energizes the start winding. The MCU does not directly control the start relay in most basic Whirlpool refrigerators; it relies on line voltage and the overload protector.

Symptoms:

The US homeowner observes a repetitive clicking sound coming from the back, bottom area of their Whirlpool refrigerator, near the compressor. The refrigerator may not be cooling properly, or the compressor may be struggling to start.

Possible Causes:

Faulty start relay
Defective start capacitor
Compressor winding failure
Low voltage supply to refrigerator
Overload condition on compressor
Loose wiring connections

Solution:

1

Unplug the refrigerator from the outlet.
2

Locate the start relay and capacitor assembly near the compressor at the back of the refrigerator.
3

Using a 1/4-inch nut driver, remove the cover plate to access the start relay and capacitor.
4

Visually inspect the start relay and capacitor for any signs of damage, such as bulging, cracking, or burning.
5

Disconnect the start relay and capacitor from the compressor.
6

Using a multimeter, test the start capacitor for capacitance. A healthy capacitor should read within its specified microfarad (uF) range. A typical reading is 20-50 uF. Replace if out of spec.
7

Test the start relay for continuity. If the relay shows no continuity, replace it.

Safety Warning:

Always disconnect the power supply to the refrigerator before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures to ensure the refrigerator cannot be accidentally powered on during the repair. Be aware of high voltage present in the start relay and capacitor circuit. Wear appropriate safety glasses and gloves.

Prevention:

Regularly clean the condenser coils located at the back or bottom of the refrigerator. This ensures proper airflow and prevents the compressor from overheating. Avoid overloading the refrigerator, as this can cause the compressor to work harder and potentially damage the start components.

Expert Tip:

If you replace the start relay and capacitor and the compressor still clicks and fails to start, the compressor itself may be faulty. Check compressor windings with a multimeter for shorts to ground or open circuits before condemning the compressor. A quick test is to use an ammeter and observe the inrush current when the compressor is attempting to start. An extremely high current with no start indicates a locked rotor.

Frequently Asked Questions

•What is the correct microfarad (uF) rating for the start capacitor in my Whirlpool refrigerator?

The correct uF rating is printed on the capacitor itself. It will typically be in the range of 20-50 uF, but always refer to the capacitor's label for the precise value.

•How do I test the compressor windings for shorts to ground?

Using a multimeter set to the resistance (ohms) setting, place one probe on each of the compressor terminals (C, S, and R) and the other probe on the compressor body (unpainted metal). A low resistance reading (close to zero ohms) indicates a short to ground.

•Where can I find a replacement start relay and capacitor for my Whirlpool refrigerator?

You can purchase replacement start relays and capacitors from appliance parts retailers, both online and in local stores. Be sure to provide the refrigerator's model number to ensure you get the correct parts.

Whirlpool Refrigerator: Clicking Sound from Bottom - Relay/Capacitor Issues

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct microfarad (uF) rating for the start capacitor in my Whirlpool refrigerator?

•How do I test the compressor windings for shorts to ground?

•Where can I find a replacement start relay and capacitor for my Whirlpool refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: