Every fridge makes some noise. A compressor humming, a fan whirring and the occasional click or gurgle are all part of normal operation. The trouble is knowing when a sound is normal and when it is the first sign of a failing fan, compressor or defrost system.
This guide matches each common fridge noise to its most likely cause, explains what you can check yourself and tells you which sounds mean it is time to book a technician.
Fridge Making Noise: The Short Answer
A soft hum, gentle whirring and occasional clicks or gurgles are normal. Loud buzzing, grinding, squealing, repeated clicking with poor cooling, or knocking from the back of the fridge are not. The most common causes of an abnormal noise are an iced-up or worn evaporator fan, a dusty or failing condenser fan, a fridge that is not level, a loose drain pan, or a compressor or start relay that is struggling. If a new noise comes with warmer temperatures, treat it as urgent.
Normal Fridge Noises You Can Ignore
- Low humming: the compressor and fans running. It gets louder for a short time after the door has been open or after loading warm food.
- Soft clicking: the thermostat or control board switching the compressor on and off.
- Gurgling or trickling: refrigerant moving through the system, or defrost water running to the drain pan.
- Crackling or popping: plastic liners expanding and contracting as temperatures change, especially during a defrost cycle.
- Hissing or sizzling for a few minutes: defrost water dripping onto the warm defrost heater.
- Ice dropping: the ice maker releasing a batch into the bin.
7 Abnormal Fridge Noises and What They Mean
1. Loud buzzing or humming
A hum that has become much louder, or a buzz that never stops, usually comes from the compressor or a fan. On fridges with an ice maker, a buzz can also mean the water inlet valve is trying to fill with no water supply connected. A compressor that buzzes, clicks off and tries again every few minutes may have a failing start relay or overload, which needs a technician.
2. Repeated clicking with poor cooling
One click at start-up is normal. Clicking every few minutes, with a fridge that is not getting cold, points to the compressor trying to start and failing. The cause might be the start relay, the overload protector, a dirty condenser or the compressor itself. Our guide on signs of a bad fridge compressor covers this in more detail.
3. Rattling or vibrating
Rattles usually come from the fridge not sitting level, the drain pan being loose underneath, bottles touching each other inside, or the fridge touching a wall or cabinet. Levelling the fridge and checking the pan fixes most rattles. Persistent vibration from the compressor area can mean worn mounts. See our article on why a fridge vibrates.
4. Squealing, chirping or high-pitched whirring
A squeal that gets louder when you open the freezer door is almost always the evaporator fan, which sits behind the freezer back panel. Worn fan bearings squeal, and the noise often changes when the door opens because the fan stops or speeds up. A squeal from the back of the fridge near the floor points to the condenser fan.
5. Grinding or scraping
Grinding usually means a fan blade is hitting something. Inside the freezer, that is often ice build-up around the evaporator fan, which is a sign the defrost system is not working. At the back, it can be debris or a bent blade on the condenser fan.
6. Knocking or banging
A single knock when the compressor stops can be normal. Loud knocking while it runs, or a bang at start-up, can mean worn compressor mounts or internal compressor wear. Have it checked promptly.
7. Constant beeping
Beeping usually means the door is ajar, the temperature has risen above the alarm point, or the control board has logged a fault. If your display also shows a code, our fridge error codes guide explains how to read it.
Hearing a noise you cannot identify? Call Ace Fridge Repairs on 0452 462 556 and hold the phone near the fridge. We can often tell a lot from the sound alone.
Quick Checks You Can Try
Switch the fridge off at the wall before touching anything at the back or underneath.
- Level the fridge. Use a spirit level and adjust the front feet so the fridge is stable and slightly higher at the front.
- Give it some space. Make sure the fridge is not touching walls, cabinets or pipes.
- Check inside. Move bottles and jars so they are not touching each other or the back wall.
- Clean the condenser area. Vacuum dust from the coils and condenser fan at the back or underneath.
- Check the drain pan. Make sure it is seated properly and not rattling.
- Look for ice. Heavy frost on the freezer back wall suggests the evaporator fan is catching on ice and the defrost system needs attention.
For a step-by-step walkthrough, read our guide on how to fix a noisy fridge.
When a Noisy Fridge Needs a Technician
Book a repair if the noise:
- comes with the fridge or freezer getting warmer
- is a squeal, grind or knock that keeps returning
- comes from the compressor with clicking and no cooling
- started after the fridge was moved or dropped
- is accompanied by a burning smell, tripping power or scorch marks
Fans, relays, control boards and anything inside the sealed refrigeration system should be handled by a qualified technician. Refrigerant work requires an ARC licence, and electrical faults are not a DIY job.
How We Diagnose Fridge Noises
Our technicians listen to the fridge through a full cycle, then check fan motors and bearings, the compressor and start components, mounting points, the drain pan and the defrost system. We explain what is causing the noise and whether the repair is worthwhile before any work begins. If the fridge is older, our repair vs replace guide can help you decide.
Noisy Commercial Fridges
Display fridges, bar fridges and coolrooms work much harder than household units, so fan motors and condenser fans wear faster. A noisy commercial unit is often an early warning of a breakdown. We provide 24/7 commercial fridge repairs and coolroom repairs across Sydney.
Noisy Fridge Repairs Across Sydney
Ace Fridge Repairs is based at 93B Pagoda Crescent, Quakers Hill NSW 2763 and services households and businesses across Greater Sydney. Check the suburbs we service and the brands we repair. All repairs carry a 12-month warranty on parts and labour.
For residential fridge repairs or urgent commercial callouts, call 0452 462 556, 24/7.
Frequently Asked Questions
Why is my fridge making a loud buzzing noise?
Loud buzzing usually comes from the compressor, a condenser fan clogged with dust, or the water inlet valve on fridges with an ice maker that is not connected to water. If buzzing comes with clicking and poor cooling, the compressor start relay may be failing.
Why does my fridge squeal when I open the freezer door?
The evaporator fan behind the freezer panel usually causes this. Worn bearings squeal, and the sound changes when the door switch stops or starts the fan. The fan motor usually needs replacing.
Is it normal for a fridge to make a clicking noise?
A single click when the compressor starts or stops is normal. Repeated clicking every few minutes with a warm fridge suggests the compressor is failing to start and should be checked.
Why does my fridge make a gurgling sound?
Gurgling is usually refrigerant circulating or defrost water draining, and it is normal. If it is very loud or constant and the fridge is not cooling properly, have it inspected.
Is a noisy fridge dangerous?
Most noises are not dangerous, but a noise with a burning smell, tripping power or poor cooling should be treated as urgent. Switch the fridge off at the wall and call a technician.
Can I fix a noisy fridge myself?
You can level the fridge, move it away from walls, clean the condenser coils and check the drain pan. Fan motors, relays and compressor faults should be repaired by a qualified technician.