The short answer
On a True Professional refrigerator, this symptom is almost never a dead compressor. It is airflow: something is stopping cold air from moving, or stopping heat from leaving. A commercial deck inside a built-in domestic cabinet means the sealed system is strong and the installation is the weak point, which inverts the usual ranking.
What you are actually seeing
- The cabinet is warm but the unit is plainly running — You can hear it working; the air inside is not cold.
- The freezer side is still cold while the fresh-food side is not — Cold is being made but not delivered, which points at airflow rather than at the compressor.
- NEAR MISS — the unit is completely silent and nothing is cold — That is a power, start relay or control fault, and it is a different page. Check the outlet and the breaker first.
Causes, most likely first on this refrigerator
- Condenser coil or grille blocked, so heat cannot leave the cabinet — Ranked first on True Professional: it is the one cause that the owner can both confirm and fix in a quarter of an hour, and on this platform it is the commonest single reason a cabinet runs without cooling. On this one, remember that the deck is commercial-grade inside a domestic cabinet, so the installation is the weak point rather than the machine.
- Ambient conditions or loading the cabinet was never rated for — Second: a garage in summer, a cabinet stuffed to the back wall, or an internal vent covered by a box will each produce this symptom with nothing broken.
- Frosted evaporator from a defrost cycle that has stalled — Third: a large column holds a big evaporator, so it takes weeks of stalled defrost to show, which is why it arrives as a mystery rather than as a bang.
- A fault on the sealed refrigerant system — Ranked last here, deliberately: this line runs commercial-grade refrigeration, so the sealed system is the strongest part of the machine and the least likely suspect.
Check in this order, and why
- First — look at the condenser and its air path — grille, back panel or the space around the cabinet — It is free, it needs no tools, and it decides whether anything else on this list is worth checking.
- Then — look at where the unit stands and how full it is — Check clearance behind and above, and check nothing inside is covering the vents at the back of the compartment.
- Only then — feel whether the condenser is warm and listen for the compressor — Only worth doing once everything above is clean, because it changes nothing an owner can act on, which is why it comes after everything above it.
What an owner can safely check
- Clear the condenser coil and the air path around it — Pull the front grille or the lower back panel and vacuum the fins clean, then check nothing is stacked against the cabinet or over the vent.
Tools: vacuum, soft brushAbout 15 min
- Empty the cabinet, switch it off at the wall and leave the doors open for a full manual defrost — If cold comes back afterwards and then fades again over the following days, the defrost system is the cause and not the compressor.
About 45 min
- STOP at the first step that needs a meter on live terminals — That is where an owner check ends and a service visit begins, and nothing above this line needs one.
Before you open anything
Safety
Unplug the cabinet or switch off its breaker before you take any panel off — a capacitor can hold a charge after the power is off. Do not tape, wedge or otherwise defeat a door switch to keep a fan running while you look: the switch is there so that a hand in the cabinet cannot meet a spinning blade. Refrigerant work is licensed work; nothing on the sealed system is an owner job.
When it stops being an owner job
Call once the air path, the gasket and the fan check are all clean, or straight away if the cabinet is silent, if the compressor buzzes and stops repeatedly, or if you can see oil around the tubing at the back. Oil outside the tubing means the sealed system is open, and every hour it runs after that costs more to put right.
Nearest pages of this class
What this page does not cover
This page is written for the True Professional refrigerator as a class, not for one family or one model line. Where a family-specific page exists for your unit it is linked above and it is the more specific answer. Deliberately not here: part numbers, wiring colours, torque figures and any measured value, all of which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
