The short answer
Most refrigerator noise comes from one of three fans and pans rather than from the compressor, and the timing of the noise tells you which. A noise that starts when the door closes is different from one that runs all the time. Open the freezer door and hold the light switch in. If the noise changes or stops, it is the evaporator fan behind the rear panel; if it continues unchanged, it is at the back of the cabinet. On a Summit Appliance refrigerator the cause that ranks first is condenser fan hitting debris in the plinth.
What you observe
- A repeated click every few minutes with no compressor run — The start relay, and this one is a warning rather than a nuisance.
- A tick or scrape that changes when the freezer door is opened — The evaporator fan behind the rear panel.
- NEAR MISS — the noise arrived with the cabinet getting warm — Then treat it as a cooling fault, which is the more urgent page.
Causes, most likely first on a Summit Appliance refrigerator
- Condenser fan hitting debris in the plinth — The fan beside the compressor draws in dust, paper and pet hair, and a scrap caught in the blade gives a loud intermittent flutter. It ranks first on a Summit Appliance refrigerator because an undercounter cabinet has its coil crammed into a shallow plinth, so it fouls far faster than a free-standing one.
- Evaporator fan blade catching frost — Frost builds on the shroud behind the freezer panel and the blade ticks or scrapes against it, loudest just after the door has been open. Second on this platform: it is the noise that changes when the freezer door is opened, which no other cause does.
- Drain pan or a cover panel rattling — The evaporation pan sits loose under the cabinet by design, and a pan that has shifted buzzes against the compressor mount. Ranked here because it is a rattle rather than a hum, and it is usually cured by hand in a minute.
- Cabinet not level, drumming on the floor — A cabinet standing on three feet transmits every compressor vibration into the floor, and the floor is louder than the appliance. Ranked here because the stance is free to correct and it is behind more noise complaints than any component.
- Ice maker filling or harvesting — The fill valve hammers, the mould heats and the ice drops, and the resulting bang is entirely normal on a schedule most owners never notice. Last, and the reason to work down the list rather than guess: it is periodic and it correlates with ice appearing, which makes it easy to confirm and easy to dismiss.
Check in this order, and why
- Unplug the cabinet and look into the plinth or the back with a torch — Debris in the blade path is visible and free to remove.
- Open the freezer and hold the door switch in, listening for the noise to change — A noise that stops with the door open is the evaporator fan.
- Press gently on the lower rear panel while the noise is happening — A noise that changes under hand pressure is a loose panel or pan.
What an owner can safely check
- Unplug the cabinet, clear the plinth or rear grille by hand and vacuum the area — Never reach into a blade path with the cabinet plugged in.
Tools: vacuum, torch, gloveAbout 20 min
- Unplug the cabinet and re-seat the drain pan squarely in its brackets — Empty and rinse it while it is out.
Tools: torch, clothAbout 15 min
- STOP HERE if the next step needs a meter on live terminals or a panel off — That is where an owner check ends and a service call begins, whatever the ranking above says.
Before you open anything
Safety
Unplug the cabinet or switch off its breaker before reaching into the plinth, behind the cabinet or near any fan blade — a capacitor can hold a charge after the power is off.
When to call a technician
Call once the plinth, the pan and the stance are ruled out and the noise is still there, and sooner if the cabinet is also failing to hold temperature. On a compact machine, expect access to be the larger half of any labour quote — the part itself is rarely the expensive part.
Nearest pages of this class
What this page does not cover
This page is written for the Summit Appliance refrigerator as a class, not for one family or model line. Where a family- or model-specific page exists for your unit it is linked above, it is the more specific answer, and it is the one to read first. Deliberately not here: part numbers, wiring colours, panel removal order and torque figures, all of which differ between families under the same nameplate.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
