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Warm inside with the compressor running points at a defrost or airflow fault far more often than at a dead compressor. Work the cheap, decisive checks first: they tell you whether this is an afternoon of cleaning or a technician visit. On the TBD models the useful thing is that they share one cabinet and one control platform, so a fault that shows up on one of them tends to show up the same way on the rest — and the check order below is built around that.
What the owner observes
- The compressor runs and never cycles off — Continuous running is the control asking for cold it never receives. Note how long it has been doing it, because weeks of it is hard on the compressor.
- Warm air blowing from the grille at the bottom or back — The condenser is dumping heat, which is normal — what is not normal is the cabinet staying warm while it does.
- Condensation or sweating on the inside walls — Warm, moist air is getting in and is not being removed, which usually rides along with one of the causes below.
- NEAR MISS — The unit is silent and nothing is cold at all — A completely dead cabinet is a supply, relay or control story. It is a short list and none of it is on this page.
Causes, most likely first
- A stalled defrost cycle icing over the evaporator — This is the fault that hides behind a panel. The compressor is fine, the fan is fine, but the cold air cannot get out of the freezer compartment because the coil it comes from is sealed in frost. It sits at the top because it is both common here and answerable without a meter or a bill. Compared with the brand-generic order, a stalled defrost cycle icing over the evaporator has moved up past a door that is not sealing, or is being opened too often here — on these models the access makes it the first check worth doing.
- A failed or blocked evaporator fan — A fan that has seized, iced up or lost its motor gives you cold in one compartment and warmth in the other — the most quickly identified pattern in this whole list.
- A dirty condenser coil or a stopped condenser fan — A stopped condenser fan produces the same result as a filthy coil, and the two are checked in the same minute at the same panel.
What to check first, and why
- First — look at the freezer rear panel for a frost sheet — The rear wall of the freezer is where the evidence lives. A solid build of ice there explains a warm cabinet completely and makes every check below it redundant.
- Second — listen at the open freezer for the evaporator fan — Hold the door switch in and listen. A fan you can hear rules this out in a second; silence where there should be air movement rules it in and saves you every check below.
- Third — look at the condenser coil and feel the airflow — Take the base grille or the rear cover off with the machine unplugged and look for a felt of dust across the coil. Clean coil and a turning fan sends you on; a blanketed one has just explained the fault.
Before you open anything
Safety
Power off first: unplug the refrigerator or switch off its breaker before removing any cover, and remember that a capacitor can hold a charge after the power is off. A refrigerator is also heavy and top-loaded with its door open — have someone steady it before you pull it out from the wall, and never chip frost off the evaporator with anything metal.
When this stops being a homeowner job
Call once the owner checks above are clean, or as soon as the evidence points at the sealed system: refrigerant work is licensed work and the equipment for it is not owner equipment. Call immediately if you see oil around the compressor or smell burning — oil outside the tubing means the circuit is open, and every hour the machine runs after that adds to the bill.
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Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
