Understanding Fridge Freezer Noises
Fridge freezers are never completely silent — the compressor cycles on and off, defrost heaters click, and fans spin continuously. But certain sounds indicate a fault that needs attention. Here’s what different noises typically mean.
Clicking or Ticking
Normal clicking: The thermostat and relays click briefly when the compressor starts and stops. This is completely normal, especially in quieter rooms.
Rapid clicking that won’t stop: This often indicates a faulty start relay on the compressor. The compressor is trying to start but the relay isn’t working correctly. The fridge may still cool for a while but will eventually fail. Engineers can usually replace the start relay quickly and inexpensively (£60–£100).
Buzzing or Humming
Normal humming: The compressor produces a low hum when running. This is expected.
Loud buzzing or vibrating: This often indicates the compressor is struggling (possibly a refrigerant issue or failing compressor), or the appliance is not level. Check that the fridge is sitting level and that the vibration isn’t from a loose internal component.
Rattling
Rattling is usually caused by the fridge vibrating against a wall, loose internal shelving, or items stored on top. Check these first. If the rattle continues once the fridge is clear, it may be a loose fan motor or compressor mounting bracket — worth having an engineer check.
Gurgling or Running Water Sounds
This is usually the refrigerant running through the system or defrost water draining. Both are completely normal, especially shortly after the defrost cycle completes.
Loud Buzzing When Opening the Ice Maker
On American fridge freezers, a buzzing when the ice maker tries to fill can indicate a water inlet valve fault. The valve may be faulty or the water pressure may be too low.
When to Call an Engineer
Call an engineer if: the noise has changed suddenly, the fridge is no longer cooling properly alongside the noise, or if you hear a grinding or scraping sound. Get 3 free quotes from local engineers to diagnose the cause.