If your fridge freezer has started making a strange noise, you're not alone. It's one of the most common call-outs Alex gets across Bournemouth, Poole and Christchurch — and the good news is that not every odd sound means a major repair. Some noises are completely normal. Others are early warnings that something inside the appliance is starting to fail. Knowing the difference can save you money, food spoilage, and a sleepless night listening to a humming kitchen.
In this guide we'll walk through the noises Alex hears most often on local jobs, what each one usually means, and what you can safely check yourself before booking a visit. If you do need a hand, our fridge freezer repair page has the full breakdown of what we cover, with repairs from £69.
The Normal Noises Every Fridge Freezer Makes
Before we get into the troubleshooting, it's worth knowing which sounds are perfectly healthy. Modern fridge freezers are mechanical machines with compressors, fans, valves and refrigerant flowing through copper pipework. They were never going to be silent. A lot of customers in Westbourne and Southbourne phone us thinking there's a fault, when actually their appliance is doing exactly what it should.
Humming and gentle whirring
A low, steady hum is the compressor doing its job. It kicks in when the internal temperature rises above the set point and switches off again once the cabinet is cool. You'll typically hear it cycle on and off several times an hour. If the hum is steady, fairly quiet, and pauses regularly — that's a healthy fridge freezer.
Gurgling, bubbling or trickling
That liquid sound is refrigerant moving through the system. It's most noticeable just after the compressor switches off. Some people describe it as a kettle starting to boil, or water running through a radiator. It's harmless and means the cooling circuit is sealed and working.
Clicking on start-up and shut-down
A single click as the compressor starts or stops is normal — it's the thermostat or start relay doing its job. Frost-free models also click when the defrost timer switches between cooling and defrost modes, usually a few times a day.
Cracking or popping
Plastic shelves, liners and internal trims expand and contract as the temperature changes. You'll often hear a sharp pop or crack, especially after a defrost cycle or when you've just packed the fridge with warm shopping. It's no different to floorboards creaking in a cold snap.
If your noise fits into one of these categories and the fridge is still cooling properly, there's almost certainly nothing wrong. Move on only if the sound is louder than usual, constant, or new.
Noises That Mean Something Is Wrong
This is where Alex's diary fills up. Some sounds are clear red flags, and ignoring them often turns a £69 repair into a full appliance replacement. Here are the noises that should make you pay attention.
Loud buzzing or vibrating
A heavy buzz, especially one that makes the cabinet rattle or the floor vibrate, usually points to one of three things: the appliance isn't level, something is touching the back panel, or the compressor mounts have worn. Start by checking the feet — a fridge freezer that's tilted even slightly will transmit vibration through the kitchen floor. Pull it gently away from the wall and make sure nothing is resting against the condenser coils at the back. If the buzz is coming from the compressor itself and feels like it's getting louder over weeks, that's an engineer job.
Knocking or banging
A sharp knock that repeats every few seconds is rarely good news. In most cases it's the condenser fan blade hitting a build-up of ice, or the evaporator fan inside the freezer struggling against frost. On American-style fridge freezers (very common in newer Poole and Christchurch builds) this often follows a door being left ajar, allowing warm air in and ice to form around the fan.
High-pitched whining or screeching
A whine that rises in pitch usually means a fan motor is on its way out. The evaporator fan inside the freezer compartment is the most common culprit — it runs constantly on frost-free models, and the bearings eventually wear. A screech that comes and goes can also be a worn compressor, which is a bigger job. Either way, don't leave it. A failed fan means warm spots in the freezer and spoiled food within a day or two.
Constant running with no break
This isn't strictly a noise problem — it's a sound that should pause but doesn't. If your compressor never switches off, the appliance is struggling to reach temperature. Causes range from a faulty door seal (easy fix) to a refrigerant leak (engineer only) to dust-clogged condenser coils. It's also the noise that costs you the most on your electricity bill, so worth sorting quickly.
Clicking that won't stop
A single click is fine. Repeated clicking every few seconds, with the compressor never actually starting, usually means a failed start relay or overload protector. These are small components mounted on the compressor and Alex can usually replace them on the first visit.
What to Check Before You Call an Engineer
Plenty of noise complaints turn out to be simple installation or housekeeping issues. Before you book a repair, run through this checklist. Alex always says about a third of the noise jobs he sees in Bournemouth could have been solved by the customer in ten minutes.
Check the appliance is level
Open the door and watch it. If it swings shut on its own or stays open in mid-air, your fridge is off-level. Most models have adjustable feet at the front — turn them clockwise to raise, anticlockwise to lower. Aim for a tiny tilt backwards so the door closes gently on its own. This single fix solves more vibration complaints than anything else.
Pull it out and clean the back
The condenser coils on the back (or sometimes underneath) collect dust, pet hair and cobwebs. A clogged coil makes the compressor work harder, run longer, and run louder. Unplug the appliance, pull it out carefully, and vacuum the coils with a soft brush attachment. Do this once a year and you'll extend the life of the appliance noticeably.
Look for items touching the cabinet
A cereal box leaning against the back wall, a wine bottle vibrating against a shelf, or the appliance itself touching the kitchen unit beside it — all of these turn small vibrations into loud rattles. Move things around and listen for the change.
Defrost a frost-free freezer
It sounds counter-intuitive, but frost-free models can still build up ice if the door seal is weak or the appliance has been overloaded. If you hear knocking or fan noise, empty the freezer, switch it off for 24 hours with the door open, and let it fully defrost. Mop up the water, switch it back on, and listen again. If the noise has gone, your door seal probably needs replacing — a job covered under our Premium Home Membership with no call-out fee.
Check the door seals
Close the door on a £5 note. If you can pull it out easily without resistance, the seal isn't gripping. A weak seal lets warm air in, ice forms, the compressor runs longer, and noise increases. Seal replacements are quick and inexpensive, and they pay for themselves in lower running costs.
If you've worked through all of this and the noise persists, that's when it's time to get Alex out. Our Bournemouth coverage extends across Boscombe, Southbourne, Winton, Charminster and out to Poole and Christchurch — usually a same-day or next-day visit.
When to Call Alex (and What to Expect)
Some fridge freezer noises are a job for an engineer from the start. If you hear any of these, don't wait — book a visit before the appliance fails completely and you lose a freezer full of food.
Signs you need a professional repair
- Loud knocking that started suddenly and won't stop
- Compressor running constantly without ever cycling off
- High-pitched whine that gets louder by the day
- Repeated clicking with no compressor start
- Any burning smell alongside the noise
- Cabinet feels warm to the touch on the sides
- Freezer temperature creeping up despite the appliance running hard
What Alex does on the visit
Alex carries a full diagnostic kit and spares for the brands he sees most often around Bournemouth and Poole — Bosch, Beko, Samsung, LG, Hotpoint and Whirlpool among others. You can see what he covers on our Bosch repair page and the other brand pages linked from there. A typical first visit starts with a temperature check, a listen to the appliance in operation, and then a structured fault-find: compressor, start relay, fans, defrost heater, thermostat, door seals. Most issues are diagnosed within 30 minutes.
Pricing and guarantee
Standard fridge freezer repairs start from £69 for the diagnostic visit, with any parts and labour quoted up front before work starts. You'll never get a surprise bill at the end. Repairs come with our workmanship guarantee, and Premium Members get an extended 1-year guarantee on parts fitted by us — one of the reasons membership pays for itself after just two repairs.
When repair isn't the right answer
Alex is straight with customers. If your fridge freezer is over 12 years old and the compressor has gone, he'll tell you the honest economics — a new compressor and gas regas often costs more than half the price of a mid-range replacement, and the rest of the appliance is on borrowed time. In those cases he'll recommend replacement rather than throwing money at a tired machine. That kind of advice is why so many Poole and Christchurch customers keep coming back.
Most importantly: don't ignore a noise that's getting worse. Fridge freezers very rarely fix themselves, and the cost of a spoiled freezer of food — plus the inconvenience of an emergency replacement — is almost always more than a timely repair. If something doesn't sound right, get it checked. Alex would rather come out and tell you it's nothing than be called in three weeks later when the compressor has seized.
To book a visit, head to our fridge freezer page or give us a call. Same-day slots are usually available across Bournemouth, Poole, Christchurch, Westbourne and Boscombe, and we'll always tell you up front whether a repair makes sense or not.