Answer first
On a Walmart Mainstays refrigerator a new noise is usually a cabinet out of level or touching something, and the sound itself tells you which. A fan fault chirps or grinds; a cabinet fault rattles; the sealed system gurgles and that one is normal. Nearly all of this is owner work: it is listening, levelling and clearing, not dismantling.
What you are looking at
- A scraping or ticking that comes and goes — Usually a fan blade meeting something that was not there last week.
- A rattle or buzz from low at the back — That is the condenser end of the machine, not the cabinet.
- 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
- 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. Nothing is broken; the sound is simply being transmitted. Ranked first on this unit: it is the cause with no fault in it at all, which is why it is worth ruling out before spending anything, which counts for more here because this is a house-brand appliance chosen on price and fitted wherever there was room, which puts placement at the top of the list.
- The evaporator fan blade catching ice, or its bearing worn — The fan behind the freezer rear panel runs almost continuously. Second: it runs more hours than anything else in the cabinet, and it is the only motor whose noise changes when you open a door.
- The condenser fan blade hitting debris — The fan behind the kick plate lives in the dustiest part of the machine. Third: 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 on purpose: it is the least likely cause and the most expensive, so every cheap cause above it is ruled out first on purpose.
Check in this order, and why
- 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.
- 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.
Owner-side checks, step by step
- 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
- 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
- STOP AT THIS POINT if the fault is on the sealed system — Refrigerant is licensed work and the tools for it are not owner tools.
Before you open anything
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.
The line between a fix and a service call
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.
Related pages for this unit
What this page does not cover
This page covers the Walmart Mainstays 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: - [Walmart Mainstays refrigerator not cooling: what it usually means](/blog/walmart-mainstays-refrigerator-cooling-failure) - [A Walmart Mainstays refrigerator that makes no ice, or not enough](/blog/walmart-mainstays-refrigerator-ice-production) - [West Bend refrigerator noise: which sounds matter and which do not](/blog/west-bend-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.
