What this usually is
The usual answer on this unit is the evaporator fan blade catching ice, or its bearing worn, with a cabinet out of level or touching something second. Where you hear it from matters more than how loud it is. Nearly all of this is owner work: it is listening, levelling and clearing, not dismantling.
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: the noise comes with a warm cabinet — Then cooling is the real fault and the noise is a clue. Read the cooling page instead.
Causes, most likely first on this unit
- 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. First, and the whole order below follows from it: it runs more hours than anything else in the cabinet, and it is the only motor whose noise changes when you open a door.
- A cabinet out of level or touching something — A fridge standing on three feet, or with a corner against a wall unit, turns the normal compressor hum into a buzz you can hear in the next room. Next, and for a closely related reason: it is the cause with no fault in it at all, which is why it is worth ruling out before spending anything.
- A failing compressor knocking under load — Worn internal mounts give a deep knock as the compressor starts, and a rising rumble as it runs. Bottom of the list, deliberately: it is the least likely cause and the most expensive, so every cheap cause above it is ruled out first on purpose.
The order to check in
- 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.
- Press down on each corner in turn and listen for the noise to change — A noise that changes when you lean on the cabinet is a mounting noise.
- 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.
The checks you can make yourself
- 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
- Check the unit is level and that no corner touches a cabinet, a wall or a pipe — Adjust the feet until it sits firm on all four.
Tools: a spirit level, a spannerAbout 20 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 is deliberately not on this page
This page covers the W.C. Wood 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: - [Water under a W.C. Wood refrigerator, and where it comes from](/blog/w-c-wood-refrigerator-water-leak) - [W.C. Wood ice maker not producing: what to check first](/blog/w-c-wood-refrigerator-ice-production) - [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.
