How to Fix a Fridge That Is Making Noise: Common Sounds and What They Mean

Fridges are not silent appliances — they produce various sounds during normal operation. But some sounds indicate a developing fault that is worth addressing early. Here is a guide to the most common fridge noises, what they mean, and what to do about them.

Normal Fridge Sounds

Before diagnosing a problem, it helps to know what is normal:

• Humming: The compressor running — this is normal. Modern inverter compressors vary speed, so the hum may change in pitch
• Gurgling or water sounds: Refrigerant flowing through the cooling circuit — normal
• Clicking: The thermostat switching the compressor on or off — normal
• Cracking or popping: Plastic components expanding and contracting with temperature changes — normal, especially in new fridges
• Fan noise: The evaporator or condenser fan running — normal

Sounds That Indicate a Problem

Loud Rattling or Vibrating

Likely cause: The fridge is not level, is touching a wall or cabinet, or has loose items on top.

Fix: Check the levelling feet and adjust until the fridge sits firmly and level on all four points. Ensure there is a gap of at least 5 cm at the back and sides. Remove items sitting on or touching the fridge.

Loud or Persistent Humming

Likely cause: The compressor is working harder than normal due to dirty condenser coils, a failing thermostat, overpacking of the fridge, or a refrigerant issue.

Fix: Clean the condenser coils (usually at the back or under the fridge), check the thermostat setting, and ensure the fridge is not overloaded. If the humming persists and the fridge is not cooling properly, call a technician.

Clicking That Does Not Stop

Likely cause: The compressor is trying to start but failing. This can indicate a faulty start relay (a small component that initiates the compressor) or a failing compressor.

Fix: The start relay is a cheap, easy repair. Remove the relay (usually on the side of the compressor), shake it — if it rattles, it has failed. Replace it. If clicking continues after relay replacement, the compressor itself may need service.

Grinding or Scraping Sound from Inside the Fridge

Likely cause: Ice build-up around the evaporator fan blade inside the freezer compartment, causing the blade to scrape against ice.

Fix: Defrost the freezer manually. If the fridge is frost-free but ice is still building up, the defrost heater or defrost thermostat may have failed — this requires a service call.

Gurgling or Running Water That Is Louder Than Usual

Likely cause: This is usually normal but can indicate a drain line issue. If you also notice water pooling inside the fridge or under it, the defrost drain may be blocked.

Fix: Clear the defrost drain (usually at the back of the freezer floor) with warm water.

When to Call a Technician

If the fridge is making abnormal sounds and is not cooling effectively, or if the compressor is not running at all, call a technician. Compressor replacement is expensive — compare repair cost to a new fridge, particularly for older units.

Contact Oceania Appliances at 0493 300 490 or visit oceaniaappliances.com.au if you need advice on repair vs replacement.