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The usual answer on a Thomson refrigerator is the cord, the outlet and the years of installations behind them. The evaporator fan catching frost is on the list below, and it is the least likely thing on it. On a long-serving machine the ranking follows its history rather than its badge: ask how many times it has been moved and re-connected, because each installation is a joint that can be the fault. Work down the order rather than across the list — the ranking is the page, and the cheapest answer arrives first.
What you are seeing
- A clattering a few times a day followed by running water — That pattern is an ice harvest and a refill, which is normal.
- A brief hiss, pop or crack on a schedule — Periodic noise with a rest between is usually the defrost cycle.
- NEAR MISS — water is appearing on the floor — A leak has its own causes and its own page. Deal with the water first.
Why this happens, in order of likelihood on Thomson
- The cord, the outlet and the years of installations behind them — On a machine of this age the connections have been disturbed repeatedly, and a cord, a hose or a terminal that was re-fitted at some point is where the fault sits. The internals are often the last honest thing in the cabinet. Ranked first on Thomson because of the kind of machine this is: on a long-serving machine the connections have been re-made far more often than the parts have been replaced.
- The condenser fan and what has collected around it — This fan is the noisiest thing in a normally-working refrigerator, so it is also the first thing to change when something goes wrong. Second, and worth doing while you are there: the same access settles both.
- The cabinet touching something — Contact noise is the easiest to prove and the easiest to overlook: the fault is not in the appliance, it is in the last three inches of where it was pushed. Third on this list, and where the diagnosis stops being something you see and starts being something you test.
- The evaporator fan catching frost — This is the noise worth taking seriously: a fan striking ice means the defrost system is not keeping up, so the noise is an early warning of a cooling fault rather than a nuisance on its own. Bottom of the list on purpose — putting the expensive candidate last is what stops a cheap fault being paid for as one.
Check in this order, and why
- First: Look at every connection that has ever been re-made — First on the list because the evidence is visible: mismatched fittings, tape, a cord that does not match the machine, a hose newer than everything around it.
- Second: Listen at the back low down while the machine is running — Second because the noise can be matched to the running cycle by ear, with the machine untouched.
- Third: Pull the machine forward a hand-width and listen again — It is last here because moving the machine is free and the answer arrives immediately.
What an owner can safely check
- Inspect the cord, the plug and every hose fitting for signs of a past repair — Look for tape, a replaced hose, a plug that does not match the age of the machine, and any discolouration at a terminal.
Tools: torchAbout 15 min
- Unplug the machine, pull it out and clear everything around the fan and coil — Vacuum the coil and the fan housing, and remove anything that has fallen behind or under the cabinet.
Tools: vacuum, soft brushAbout 25 min
- STOP HERE if the next step needs a meter on live terminals — That is the line between an owner check and a service call, and it is not worth crossing.
Read this before you start
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Refrigerant work is licensed work, so stop at the sealed system. Never defeat a door switch to keep a fan running, and move a loaded cabinet with two people and a floor protector.
Where owner work ends
The line is simple: everything above is reachable and reversible, and nothing below it is. Anything on the sealed system — refrigerant, the compressor, the tubing — is licensed work, and a machine that has been opened is a machine that needs a technician. Call sooner if the fault is getting worse rather than staying the same, because a cheap cause left alone is how an expensive one arrives.
Closest pages to this one
What this page does not cover
What this page does not do is speak for one family or one model. It covers Thomson refrigerators generally, and no family-specific page exists for it yet to send you to — when one is published, this page will link down to it and defer to it. Also absent by choice: part numbers, wiring detail and dismantling order.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
