The short answer
On a WANAI refrigerator this is usually a condenser coil choked with dust and pet hair rather than a dead compressor: the cabinet warms while the unit keeps running, which is the signature of an airflow fault and not a power fault. The first two checks below need no tools and no panel off; the cause at the bottom of the list is a service call.
What you are looking at
- Frost builds as a sheet on the freezer back wall — Not the usual light dusting, but a solid layer over the panel.
- 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 condenser coil choked with dust and pet hair — The coil is how the unit sheds heat. Blanketed in dust it cannot, so the compressor runs longer and longer and still never pulls the cabinet down. Ranked first on this unit: it is the maintenance job nobody is told about at purchase, and it produces exactly this symptom without ever making a noise, which counts for more here because this is a compact unit bought online and sited wherever it fitted, so clearance, levelling and loading habits rank above anything inside the cabinet.
- A door seal that is not closing on the cabinet — A seal that has taken a set, or a door held off by a shelf or a bottle, lets warm room air in all day. Second on this unit, because a compact cabinet is packed to its limit and the door is the part that is opened, leaned on and loaded against.
- 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.
What to check first, second, third
- Pull the unit out and look at the coil at the back or behind the kick plate — Dust here is the cheapest cause on the list and the easiest to rule out.
- Close the door on a sheet of paper and pull it out, all the way round both doors — If it slides out freely anywhere, the seal is not making contact there.
- 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
- Unplug the unit, take off the kick plate and clear the condenser coil and its fan — A vacuum and a soft brush are enough. Do not bend the fins.
Tools: a vacuum, a soft brushAbout 25 min
- Test the seal with a sheet of paper at several points around each door — Drag on the paper means contact. A free slide means a gap.
Tools: a sheet of paperAbout 10 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
Switch the refrigerator off at its breaker, or unplug it, before any panel or kick plate comes off. A capacitor can hold a charge after the power is off, and the compressor circuit is live the whole time the unit is plugged in. Leave the door switches exactly as they are: they cut the fan on purpose. Nothing on the sealed system is owner work, because refrigerant is licensed work.
Where an owner check ends
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
Scope of this page, and where to go for more
This page covers the WANAI 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: - [A WANAI refrigerator that makes no ice, or not enough](/blog/wanai-refrigerator-ice-production) - [A WANAI refrigerator that buzzes, rattles or knocks](/blog/wanai-refrigerator-abnormal-noise) - [Why a Weili refrigerator runs but will not get cold](/blog/weili-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.
