Common fridge problems, explained
Fridge not cooling? Here's what's actually going wrong
A fridge that hums along but stays warm is rarely "dead", in most cases one specific component has failed, and most of them are repairable. Here's how to read the symptoms before you panic-buy a new fridge. We repair every major brand, including Bosch, Samsung, AEG, Smeg and LG, with same-day call-outs across Centurion, Bedfordview, Midrand and the wider Gauteng metro.
What's happening inside the cabinet
Your fridge doesn't make cold, it removes heat
Every fridge works the same way: a compressor pumps refrigerant gas around a sealed circuit, the evaporator coil absorbs heat from inside the cabinet, and the condenser coil dumps that heat into your kitchen. In a frost-free fridge, an evaporator fan then blows the chilled air from the freezer compartment into the fridge section through an air channel, regulated by a damper and a thermostat.
When a fridge stops cooling, one of those links in the chain has broken. The compressor may not be pumping, the refrigerant may have leaked out, the airflow may be blocked by ice, or the controls may simply have stopped asking for cold. The skill in repair is identifying which link failed, because the fixes range from a quick part swap to a compressor replacement.
Read the symptoms
What pattern is your fridge showing?
Fridge warm, freezer fine
The classic frost-free fault. Usually a failed defrost system letting ice block the air channel, or a dead evaporator fan, not a gas or compressor problem.
Both compartments slowly warming
Points to a refrigerant leak, a tired compressor, or condenser coils so dusty the system can't shed heat. The fridge runs longer and longer to achieve less and less.
Runs constantly, never reaches temperature
Often low gas from a slow leak, a faulty thermostat that never tells the compressor to rest, or a door seal letting warm air pour in around the clock.
Clicks every few minutes, no cooling
A compressor trying to start and failing, frequently just the start relay, especially after power surges. Cheap to fix if caught before the compressor overheats.
The usual suspects
Six components cause most cooling failures
Defrost system: frost-free fridges melt frost off the evaporator several times a day. When the defrost heater, timer or sensor fails, ice slowly entombs the coil and chokes airflow, common on frost-free Samsung and Hisense models. Evaporator fan: if it stops, cold air never leaves the freezer. Thermostat or control board: the fridge never receives the instruction to cool.
Refrigerant leak: gas escapes through a corroded pipe or failed joint; cooling fades over weeks. Start relay: a small, surge-sensitive part that starts the compressor, a frequent casualty of load-shedding power spikes. Compressor: the genuine end-of-life fault, but less common than people assume, and often misdiagnosed.
Why waiting costs more
What happens if you leave it
A fridge that's struggling doesn't fail politely. Food sitting above 5 °C starts spoiling within hours; a fridge running non-stop can add noticeably to your electricity bill; and a compressor forced to run continuously against a blocked coil or low gas wears out far faster than it should. A R600 fan repair ignored for two months can become a compressor-level bill.
How a professional repair proceeds
- Listen and measure. The technician checks compartment temperatures, listens to the compressor and fans, and asks when the problem started.
- Test the airflow path. Back panels come off to inspect the evaporator for ice and confirm the fan runs.
- Check the electrics. Thermostat, defrost components and start relay are tested with a multimeter, not guessed at.
- Check the gas circuit. Pressures are measured; if gas is low, the leak is found with an electronic detector before any regassing happens.
- Quote, then repair. You get a written quote first. Most cooling faults are fixed on the spot from van stock.
Safe DIY vs technician work
What you can try before calling anyone
Safe and worthwhile: check the plug and the wall socket with another appliance, make sure the thermostat dial hasn't been knocked to its warmest setting, pull the fridge out and brush or vacuum the condenser coils, confirm there's a 5 cm gap behind the unit, and check the door seal closes on a piece of paper. After load-shedding, give the fridge ten minutes, compressors deliberately delay restarting.
Not DIY territory: anything involving refrigerant gas (sealed, pressurised, and regulated), capacitor and relay testing (stored charge can bite), and compressor work. Brands we see weekly with cooling faults include Samsung, LG, Bosch, Whirlpool, Defy, Hisense and KIC, the faults differ by design, which is exactly why diagnosis matters.
Why book with us
Diagnosis first, parts second, invoice last
Instrument-led diagnosis
Gauges, probes and leak detectors find the actual fault, so you don't pay for a regas when the problem was a fan.
Stocked vans
Fans, thermostats, relays and gas on board mean most cooling repairs are finished in a single visit.
Written quotes upfront
You approve the price before a single screw turns. No surprises on the invoice.
Honest repair-or-replace advice
If fixing your fridge doesn't make financial sense, we'll say so and save you the money.
Warm fridge, cold facts: act today
Most cooling faults are caught-early repairs, not death sentences. The sooner a technician puts gauges on the system, the cheaper the fix tends to be, and the more of your food survives. Book a repair online or call 081 234 5678 and describe what the fridge is doing.
Brands, faults & areas
Fridge Not Cooling: the brands we repair and the Gauteng areas we cover
Fridge brands we repair
We service all the major makes sold in South Africa, from everyday models to premium, electronically controlled units: Samsung, LG, Defy, Bosch, Whirlpool, Hisense, Kelvinator, KIC, AEG, Smeg and Electrolux.
Common fridge & freezer faults we fix
Whatever the symptom, we diagnose it with proper instruments before we quote. The faults below are the ones we are called out for most.
Areas we serve across Gauteng
Same-day call-outs across Johannesburg, Pretoria and the wider metro, from Sandton and Midrand to the East Rand. Find your area below.