The short answer
On an under-counter refrigerator, a cabinet that runs and still will not hold temperature points first at one thing: the front ventilation grille is obstructed. Next on the list: too little air gap around the cabinet. The checks that matter most need no tools; the sealed system is the only part that is not owner work.
What you observe
- The cabinet is warm and the machine is clearly running — Work is going in and no cold is coming out.
- The cabinet front and the kickboard feel warm — Rejected heat with nowhere to go banks up inside the cabinetry.
- The recess itself feels warm to stand beside — Trapped exhaust warms the cabinetry around the machine.
- The machine compartment runs hot and noisy — A coil that cannot shed heat makes the fan and compressor work harder.
- NEAR MISS — the cabinet is silent and nothing is cold — That is a no-power or start-relay fault, and it belongs on a different page.
Causes, most likely first on this unit
- The front ventilation grille is obstructed — First and by a distance on a front-venting cabinet. Built into a flush cabinet cut-out under a worktop, it has no rear airflow at all — everything it rejects leaves through the toe-kick grille.
- Too little air gap around the cabinet — Ranked here because a tight recess quietly costs the condenser a large part of its capacity without anything breaking.
- Condenser coil blanketed with dust — Ranked here, and it is the cause that most often turns out to be the whole story once the obvious things are clear.
- The door gasket is no longer sealing — Last of the owner-checkable causes, and the one people skip because the door still looks shut.
Check in this order, and why
- Clear and inspect the toe-kick grille — Its entire cooling airflow passes through there and nowhere else.
- Check the gap at the back and the sides by hand — If the exhaust has nowhere to go, nothing downstream will help.
- Find and inspect the condenser coil — A grey felt across the fins is the commonest cause of poor cooling anywhere.
- Run the paper test around all four sides of the door — A sheet that slides out freely anywhere is a leak you can feel.
What an owner can safely check
- Note what the cabinet is actually doing before touching anything — Running or silent, one compartment or both, since when.
About 10 min
- Pull everything away from the grille and vacuum it through — Restores the only airflow path a built-in cabinet has.
Tools: vacuumAbout 15 min
- Pull the cabinet forward a hand’s width for a day — If it recovers overnight, the recess was the whole fault.
About 15 min
- Vacuum and brush the condenser coil clean — Work along the fins rather than across them so they are not flattened.
Tools: vacuum, soft brushAbout 25 min
- STOP HERE if the next step needs a meter on live terminals — That is the line between an owner check and a service call, and it does not move.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. A built-in slides under its own weight and traps fingers against the carcass. Support it as it comes out, and take the door off only with a second pair of hands.
When to call a technician
Call once the airflow and door checks above are clean and the cabinet still will not hold temperature — at that point the remaining causes are behind a panel or inside the sealed system. Call sooner if the compressor runs without a break: a cabinet that never reaches temperature works far harder than a healthy one. Call immediately if you smell burning or see oil anywhere near the compressor: oil outside the tubing means the system is open.
Nearest pages of this class
What this page does not cover
This page is written for the brand and the cabinet class, not for one family or model line. Where a family- or model-specific page exists for your unit, it is the more specific answer and it is where to start. Deliberately absent: cut-out dimensions, grille and hinge identifiers and torque figures, which differ between the under-counter and tall built-in families.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
