What this usually is
The usual answer on this unit is the evaporator fan blade catching ice, or its bearing worn, with the condenser fan blade hitting debris second. Where you hear it from matters more than how loud it is. Locating the sound is most of the job and costs nothing.
What you actually observe
- The whole cabinet hums and the floor buzzes with it — The cabinet is passing vibration into the structure it stands on.
- NEAR MISS: a loud crack once or twice a day — Plastic liners expand and contract with the defrost cycle. That is normal and needs nothing.
What it usually turns out to be, in order
- The evaporator fan blade catching ice, or its bearing worn — The fan behind the freezer rear panel runs almost continuously. Ice grown onto the shroud gives a rhythmic scrape; a dry bearing gives a chirp that rises as the unit runs. Ranked first on this unit: it runs more hours than anything else in the cabinet, and it is the only motor whose noise changes when you open a door, which counts for more here because this is a badge with little published service documentation, which is exactly why this list starts with what you can observe and ends with what only a meter can settle.
- The condenser fan blade hitting debris — The fan behind the kick plate lives in the dustiest part of the machine. Second: it sits at floor level behind an open grille, which is exactly where debris collects.
- A failing compressor knocking under load — Worn internal mounts give a deep knock as the compressor starts, and a rising rumble as it runs. Last, and that is the point of this order: it is the least likely cause and the most expensive, so every cheap cause above it is ruled out first on purpose.
What to check first, second, third
- Open the freezer and press the door switch in, then listen — A noise that starts and stops with the switch is on that fan, and nothing else is.
- Unplug the unit and look at the condenser fan behind the kick plate — Debris is visible at a glance with a torch.
- Only after the fans, the pan and the levelling are all clean — At that point the noise is in the sealed system and it is not an owner job.
What an owner can safely check
- Hold the freezer door switch in and listen at the rear panel — If the noise follows the switch, you have located it without removing anything.
About 5 min
- Unplug the unit, remove the kick plate and clear anything around the condenser fan — Turn the blade by hand: it should spin freely and not wobble.
Tools: a torch, a vacuumAbout 25 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 the kick plate or reaching behind the unit. A capacitor can hold a charge after the power is off. Never put a hand near a fan blade to stop it or to feel it while the unit is plugged in, and never run the unit with the kick plate off to listen: that is exactly when fingers meet the condenser fan.
When to call a technician
Call once the fans, the pan and the levelling are all ruled out and the noise is still there, because what is left is the sealed system or the start circuit. Call sooner if the compressor tries to start and gives up, if the noise comes with a warm cabinet, or if the unit trips a breaker.
Nearest pages of this class
What this page does not cover
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: fan part numbers, compressor mount specifications and any panel removal sequence, all of which differ by family and belong on the page for that family.
Links: - [Wellington ice maker not producing: what to check first](/blog/wellington-refrigerator-ice-production) - [A Wellington refrigerator that is running and still warm inside](/blog/wellington-refrigerator-cooling-failure) - [A WANAI refrigerator that buzzes, rattles or knocks](/blog/wanai-refrigerator-abnormal-noise)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
