Whirlpool Refrigerator: Clicking Sound and Water Inlet... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) sends a 120V AC signal to the water inlet valve solenoid when the icemaker or water dispenser is activated. This voltage energizes the solenoid, opening the valve and allowing water to flow. A defective MCU relay or damaged wiring can interrupt this voltage path, or a failing valve can cause clicking as it struggles to open or close.

Symptoms:

The homeowner reports a clicking sound coming from the back of the Whirlpool refrigerator, potentially near where the water line connects. They may also be experiencing issues with the ice maker or water dispenser not working correctly. There may be visible leakage from the water inlet valve area.

Possible Causes:

Faulty water inlet valve
Low water pressure
Icemaker demand
Defective MCU (Main Control Unit) relay
Wiring issue to the water inlet valve

Solution:

1

Unplug the refrigerator or turn off the breaker at the breaker panel.
2

Locate the water inlet valve, typically at the lower back of the refrigerator. Use a 1/4-inch nut driver to remove the access panel if necessary.
3

Disconnect the water line from the inlet valve. Have a towel ready to catch any water.
4

Disconnect the electrical connector to the valve. Use a multimeter to test for 120V AC when the icemaker is calling for water. If no voltage is present, investigate wiring and the MCU.
5

If voltage is present, the valve is likely the issue. Replace the water inlet valve with a new one.
6

Reconnect the water line and electrical connector to the new valve. Ensure secure connections.
7

Restore power to the refrigerator and test the icemaker and water dispenser. Monitor for leaks.

Safety Warning:

Always disconnect power to the refrigerator before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures to prevent accidental power restoration. High voltage (120V AC) is present in the appliance; exercise caution to avoid electrical shock.

Prevention:

Regularly inspect the water line for leaks or kinks. Replace the water filter every 6 months to prevent sediment buildup in the water inlet valve. Ensure adequate water pressure to the refrigerator (minimum 20 PSI).

Expert Tip:

Some Whirlpool refrigerators have a service mode accessible through the control panel. This mode can be used to manually activate the water inlet valve for testing purposes. Refer to the service manual for your specific model for instructions on entering service mode.

Frequently Asked Questions

•How do I test the water inlet valve with a multimeter if I don't know when the ice maker is calling for water?

You can force the icemaker cycle. Typically, there are test points on the icemaker module. Use a jumper wire to simulate the thermostat closing and initiating a harvest cycle. Consult your refrigerator's service manual for the specific test points and procedure. This will trigger the water valve to open, allowing you to test for voltage.

•What if I replace the water inlet valve, but the clicking sound persists?

If the clicking persists after replacing the valve, the issue could be with the MCU relay that controls the valve. The relay may be chattering due to damage or a weak signal. Replacing the MCU may be necessary. Also check the wiring harness for any damaged or corroded connections.

•How can I determine if the water pressure to my refrigerator is sufficient?

You can purchase a water pressure gauge at most hardware stores. Connect it to the water line at the refrigerator's inlet. The pressure should ideally be between 20 and 120 PSI. Lower pressure can prevent the water inlet valve from operating correctly and can cause the clicking sound as it struggles to open.

Whirlpool Refrigerator: Clicking Sound and Water Inlet Valve Replacement Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I test the water inlet valve with a multimeter if I don't know when the ice maker is calling for water?

•What if I replace the water inlet valve, but the clicking sound persists?

•How can I determine if the water pressure to my refrigerator is sufficient?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: