Whirlpool Refrigerator Clicking Sound & Water Hammer:... | appliancefaults.com

Technical Background:

The refrigerator's Main Control Unit (MCU) controls the water inlet valve and ice maker functions. The valve opens and closes to allow water flow. Rapid valve closure, especially with high water pressure, can create pressure waves in the water line, causing the 'water hammer' effect. The clicking could be the valve actuating repeatedly, failing to open/close properly, or a faulty ice maker module attempting to harvest ice.

Symptoms:

The homeowner reports a clicking sound coming from the back of the refrigerator, often accompanied by a knocking or hammering sound when the water dispenser or ice maker is used. This is often described as 'water hammer'.

Possible Causes:

Faulty water inlet valve
Low water pressure
Defective ice maker module
Loose water line connections
Air trapped in the water line
High water pressure causing hammer effect

Solution:

1

Turn off the refrigerator's power at the breaker panel.
2

Locate the water inlet valve (usually at the back, near the bottom). Inspect for cracks or leaks. Check the coil with a multimeter; it should read approximately 200-500 ohms.
3

Inspect the water supply line for kinks or damage. Ensure water pressure is within the range of 20-120 PSI.
4

Check the ice maker module for proper operation. If the ice maker is constantly cycling or not filling properly, it may be causing the clicking.
5

Inspect all water line connections for leaks and ensure they are tightened securely. Use a 7/16-inch wrench to tighten compression fittings.
6

Purge air from the water lines by dispensing water from the dispenser for several minutes.
7

If water hammer persists, install a water hammer arrestor near the refrigerator's water inlet valve using Teflon tape on the threads.

Safety Warning:

Always disconnect power to the refrigerator at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures must be followed to prevent accidental re-energizing of the circuit. Some components may retain a high voltage charge even after power is disconnected.

Prevention:

• Periodically check water pressure to ensure it's within the recommended range.
• Replace the water filter every 6 months.
• Inspect water lines for leaks or damage annually.

Expert Tip:

Enter service mode by pressing and holding the 'Freezer Up' and 'Fridge Down' buttons simultaneously for 3 seconds. Run diagnostic tests on the water valve and ice maker to pinpoint the problem. Note any error codes displayed.

Frequently Asked Questions

•What is the ideal water pressure for my refrigerator?

The ideal water pressure for most refrigerators is between 20 and 120 PSI. Check your owner's manual for the specific requirements for your model.

•How do I test the water inlet valve with a multimeter?

Disconnect the valve from the refrigerator. Set your multimeter to the ohms setting. Place the probes on the terminals of the valve's solenoid. You should read approximately 200-500 ohms. An open circuit indicates a faulty valve.

•Where can I purchase a water hammer arrestor?

Water hammer arrestors can be purchased at most plumbing supply stores or home improvement centers. Ensure you get the correct size for your refrigerator's water line (usually 1/4-inch or 3/8-inch compression fitting).

Whirlpool Refrigerator Clicking Sound & Water Hammer: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the ideal water pressure for my refrigerator?

•How do I test the water inlet valve with a multimeter?

•Where can I purchase a water hammer arrestor?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: