Refrigerator is making a loud or unusual noise

Q: Refrigerator is making a loud or unusual noise

In Canada, most refrigerator noises are normal: a steady hum from the compressor, occasional pops or cracks as parts expand and contract, and a gurgle or hiss from refrigerant and the defrost cycle. If it buzzes or rattles, first check that the fridge is level and not touching a wall or cabinet, and that nothing loose is sitting on top or vibrating at the back. A grinding or buzzing fan often just needs the dusty coils cleaned, but a failing fan or a new, loud, constant compressor noise is an appliance technician's job. If you ever smell burning or hot electrical, unplug the fridge and call a technician.

Fridges are not silent — most of the sounds that worry people are the appliance working exactly as designed. A little detective work usually tells you whether it's normal or worth a look.

tuneWhat are you noticing?

Select anything that matches and the checklist below reorders to fit. Not sure? Skip it.

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Start here

In Canada, start by naming the sound. A steady hum, an occasional pop or crack, or a gurgle and hiss that come and go are the fridge running normally — the compressor, parts expanding with temperature, and refrigerant and defrost doing their jobs. If the sound is intermittent and not new, there's very likely nothing to fix.

Ranked from real-world failure data. The order updates as you select what you’re noticing above.

Likely causes, in the order to check them

Showing the typical order

Beginner-friendly Doable, with care Safety-critical Call a pro

visibilityHow to check

With the fridge running, rest a hand on the top and sides. A buzz that dulls or changes when you press means vibration is transferring into the cabinet or its surroundings.
Check the gaps: the fridge should have a few centimetres of clearance and shouldn't be pressed against a wall, cabinet, or countertop that it can buzz against.
Set a level on top front-to-back and side-to-side. A fridge that rocks or reads off-level lets the compressor's vibration rattle the frame — that's the buzz to chase.

buildlevel schedule10 min

handymanHow to fix it

Ease the fridge away from anything it touches, then adjust the front levelling feet (or roller screws) until it sits solid and level, killing the vibration that becomes a buzz.

Slide the fridge out enough that no side or the back touches a wall, cabinet, or counter — leave a few centimetres of breathing room all around.
Find the two front levelling feet or roller-adjustment screws behind the base grille. Turn them to raise or lower each corner until the fridge no longer rocks.
Set a level on top and fine-tune until it reads level (a hair higher at the front helps the doors self-close). Push it back, leaving the clearance, and listen — the buzz should be gone.

schedule15 min savingsusually free

gavel Check your province first AB: homeowner may do this · BC: homeowner may do this · ON: homeowner may do this · PE: homeowner may do this · QC: homeowner may do this
Levelling a fridge and cleaning condenser coils are routine homeowner maintenance in every province; replacing a fan motor, compressor, or any refrigerant work is an appliance technician's job.

visibilityHow to check

warning Unplug before you reach behind the fridgeThe back and base of a fridge hold live electrical parts and a fan that can start on its own. Pull the plug (or switch off the breaker) before reaching in to inspect or clean the coils — don't rely on the fridge simply being between cooling cycles. If reaching around the compressor and wiring makes you uneasy, a coil clean and fan check is a quick job for an appliance technician.

Unplug the fridge, then ease it out from the wall so you can reach the back or the base grille at the bottom.
Shine a light on the condenser coils and fan. Grey, matted dust and pet hair choking the coils is the usual cause of a straining hum or buzz.
With the power off, gently turn the condenser fan blade by hand — it should spin freely. Grinding, stiffness, or a wobble means the fan itself is worn, which is a technician's repair, not a cleaning.

buildvacuumbuildcoil brushbuildflashlight schedule20 min

handymanHow to fix it

warning Power off, and don't force the fanCleaning coils means working right next to the compressor, the fan motor, and live wiring. Keep the fridge unplugged the whole time, and if the fan blade is stiff or grinding, don't force or lubricate it — that's a sign the motor is failing and needs a technician, not a homeowner fix.

With the fridge unplugged, brush and vacuum the dust out of the condenser coils and around the fan so it stops straining — the most common cure for a hum or buzz from the back or bottom.

Unplug the fridge and pull it out, or pop off the front base grille to reach coils mounted underneath.
Work a coil brush through the fins to loosen the packed dust, then vacuum it all up — including the fan blades and the floor beneath. Keep the brush clear of the fan motor wiring.
Plug back in and listen. If a clean fan still grinds or buzzes, stop here and book an appliance technician — a worn fan motor is a replacement, not a cleaning.

schedule25 min savings$10–25

Refrigerator coil cleaning brushA long, narrow bristle brush (about 60 cm) sized to reach between condenser fins

verifiedWhy this one goes to a pro

The compressor is part of the sealed refrigerant system. In Canada, opening that system requires refrigerant-handling certification, and a failing compressor is usually diagnosed and replaced (or the fridge retired) by a technician. Noticing the noise is all a homeowner should do — an appliance technician can confirm it quickly and tell you if it's worth repairing.

Your notes travel with the request — what you saw, what you ruled out, when it started — so the pro arrives with a head start instead of a mystery.

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Why the list is in this order

We don’t sort by likelihood alone. We sort the way a good, honest tradesperson thinks: rule out the free, safe, common causes first. That’s why the cheap checks outrank the expensive repairs — and why anything dangerous gets a hard stop instead of a pep talk. The order exists to save you money, not to sell you anything.