Quick answer
Soft humming, gurgling and occasional cracking sounds are normal in a working fridge. Loud rattling usually means it is not level or something is touching the back, while grinding or squealing points to a worn fan motor. Repeated clicking without cooling, or very loud buzzing from the compressor, needs a technician.
Signs you may notice
- Loud buzzing or humming from the back
- Rattling or vibrating sound, especially when the compressor starts
- Clicking every few minutes while the fridge stays warm
- Grinding, squealing or fan-scraping noise from the freezer
- Knocking sound when the compressor starts or stops
Common causes (most likely first)
- 1
Fridge not level or touching the wall
You can checkAn uneven floor or a fridge pushed against a wall or cupboard makes vibrations louder. Items kept on top can also rattle.
- 2
Loose items or drip tray
You can checkBottles and shelves inside, or a loose drip tray at the bottom, can rattle each time the compressor runs.
- 3
Fan hitting ice or wearing out
Needs technicianIn frost-free fridges, ice build-up can touch the freezer fan blades. A dry or worn fan motor can squeal or grind.
- 4
Dusty condenser fan (some models)
Needs technicianSome fridges have a small fan near the compressor. Dust and dirt on it can cause a whirring or scraping sound.
- 5
Relay clicking without starting
Needs technicianIf you hear a click every few minutes but the compressor does not run, the relay, overload or compressor may be faulty.
- 6
Compressor wear
Needs technicianAn old or failing compressor can knock, buzz loudly, or vibrate heavily. This usually comes with weak cooling.
Safe checks you can do yourself
- 1Move the fridge slightly away from the wall and cupboards so it is not touching anything.
- 2Check that it stands level and does not rock; adjust the feet if possible.
- 3Remove items from the top of the fridge and rearrange bottles inside so they are not touching each other.
- 4Unplug the fridge and listen after plugging back in — note whether the noise comes from the back, the freezer, or below.
- 5If ice has built up in the freezer, defrost it by switching off and letting it melt naturally.
Always switch off and unplug the appliance before checking. Never open panels, touch wiring or try to refill gas yourself.
When to call a technician
- Clicking every few minutes and the fridge is not cooling
- Grinding or squealing from the freezer fan
- Loud buzzing or knocking from the compressor
- Noise started along with a burning smell or hot socket
FAQ
Frequently asked questions
Is it normal for a fridge to make noise?
Yes, a low hum from the compressor, gurgling from the gas flowing and small cracks as parts cool are normal. Loud, harsh or new noises are worth checking.
Why is my fridge making a clicking sound?
A single click when the compressor starts or stops is normal. Repeated clicks every few minutes with no cooling usually mean a relay, overload or compressor fault.
Why is my fridge buzzing loudly?
It may be vibrating against a wall or uneven floor, or the compressor may be struggling, sometimes due to low voltage. If moving and levelling it does not help, get it checked.
Can low voltage make a fridge noisy?
Yes, low voltage can make the compressor struggle to start and hum loudly. A suitable stabilizer helps in areas with frequent voltage drops.