Answer first
A Wellington fridge that runs and stays warm is pointing at a frosted-over evaporator and a stalled defrost cycle far more often than at the sealed system. The next most likely cause is a failed or obstructed evaporator fan. The first two checks below need no tools and no panel off; the cause at the bottom of the list is a service call.
The symptoms, and their near misses
- The compressor never seems to cycle off — It runs on and on without ever reaching temperature.
- NEAR MISS: the unit is silent and nothing is cold — That is a no-power or start-relay fault, and it is a different page from this one.
The ranking: most likely cause first
- A frosted-over evaporator and a stalled defrost cycle — Ice builds on the evaporator until air can no longer pass through it. The unit keeps running and keeps making cold, but none of it reaches the cabinet. It leads the list on a Wellington refrigerator because the defrost system stalls long before it fails outright, so the ice builds quietly over weeks and what the owner notices is the warmth, never the frost.
- A failed or obstructed evaporator fan — The fan behind the freezer rear panel is what pushes cold air into the fresh-food side. Next, and for a closely related reason: it is the one motor in the cabinet that runs almost continuously, and it is the part that gives out first on most platforms.
- A sealed-system or compressor fault — A refrigerant leak or a failing compressor gives the same warm cabinet as everything above it, which is exactly why it is diagnosed last and not first. Last, and that is the point of this order: it is the least common cause on this list and the only one that is not an owner fix, so checking it first only ever wastes money.
Check in this order, and why
- Look at the freezer rear panel for a sheet of frost — This separates an airflow fault from a cooling fault before any tool comes out.
- Open the freezer and listen for the fan, then press the door switch in by hand — If the fan does not start when the switch is held in, you have found it.
- Feel whether the condenser coil is warm along its length — Only worth doing once everything above is clean, and only a technician can act on it.
What an owner can safely check
- Empty the freezer, switch the unit off at the wall and leave both doors open until it is fully thawed — If cold returns afterwards and then fades again over days, the defrost system is your cause.
About 45 min
- Hold the freezer door switch in and listen for the fan behind the rear panel — No fan noise with the switch held in points straight at the fan or its switch.
About 5 min
- STOP HERE if the fault is on the sealed system — Refrigerant is licensed work and the tools for it are not owner tools.
Safety first, and it is not boilerplate
Safety
Unplug the refrigerator or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off, and the compressor circuit is live whenever the unit is plugged in. Leave the door switches wired as they are: they cut the fan for a reason. Refrigerant work is licensed work and nothing on the sealed system is an owner job.
The line between a fix and a service call
Call once the checks above come back clean, or the moment the fault is on the sealed system: refrigerant is licensed work and the tools for it are not owner tools. Call sooner if you smell burning, see oil around the compressor, or the unit trips a breaker.
Where to go next in this class
What is deliberately not on this page
This page covers the Wellington refrigerator as a class, not one family or model line. Where a family- or model-specific page exists it is linked here. Deliberately not here: wiring colours, board part numbers, refrigerant charge figures and any sealed-system procedure, all of which differ by family and belong on the page for that family.
Links: - [Wellington refrigerator leaking onto the floor: what to check](/blog/wellington-refrigerator-water-leak) - [Wellington refrigerator noise: which sounds matter and which do not](/blog/wellington-refrigerator-abnormal-noise) - [Why a WANAI refrigerator runs but will not get cold](/blog/wanai-refrigerator-cooling-failure)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
