The short answer
On the HS line, the most common reason a refrigerator is not cooling is condenser coil choked with dust or blocked airflow. On this page that cause is ranked ahead of airflow blocked by a frosted evaporator, which is where the order departs from the brand-generic article above; the ranking below says what about this platform moved it. Two of the three causes below are owner-checkable with no tools worth naming, and the last of them is a service call.
What you see on the HS line
- A sheet of frost on the freezer rear wall — Not the light dusting a freezer normally carries, but a continuous white slab over the panel that hides the evaporator.
- The freezer is still cold but the fresh-food side is not — A split like this points at airflow between the two compartments rather than at cooling itself, and it is the single most useful thing you can notice.
- The compressor runs and never cycles off — A healthy unit rests between cycles. One that never stops is trying to reach a temperature it cannot reach.
- Warm air coming off the back or the toe grille — Some heat there is normal. Air hot enough to be uncomfortable means the condenser is rejecting more heat than it can shed.
- NEAR MISS — the unit is silent and the light is out — That is a power, cord or main-board fault, not a cooling fault, and it is a different page.
Causes, most likely first on the HS line
- Condenser coil choked with dust or blocked airflow — The condenser sheds the heat the system takes out of the food. Blanketed in dust, or pushed too close to a wall, it cannot, so the system runs continuously and still loses ground. It ranks where it does because it is common, entirely preventable, and the one cause on this list an owner can clear in a quarter of an hour. Two models sit under this family key. They are close enough relatives that a fault found on one is worth suspecting on the others.
- Airflow blocked by a frosted evaporator — The defrost cycle stops clearing the evaporator, frost builds into a slab, and the slab blocks the only path cold air has into the cabinet. The unit keeps running because the sensor it trusts never sees the temperature it wants. It ranks where it does because it is the only common fault that keeps everything sounding perfectly normal while the cooling stops reaching the food.
- Sealed-system or compressor fault — A leak, a blockage or a compressor that no longer pumps ends cooling altogether. The motor may still hum, which is exactly why this cause is diagnosed last rather than first. It is last because it is the least likely of the group and the only one that is not an owner repair under any circumstances.
Check in this order, and why
- First: Feel the condenser and the air leaving the unit — Uncomfortably hot air, or a coil you cannot see the fins of, names this cause on the spot. It comes first because it is the cheapest of the three to exclude and because everything below it is harder to read while it is unresolved.
- Second: Look behind the freezer rear panel for a frost slab — If the panel is cold to the touch and edged with ice, this is your cause and the rest of the list can wait.
- Third: Only after the checks above: is the condenser cold and the evaporator dry? — This is where owner diagnosis ends; refrigerant work is licensed work.
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. Keep sharp tools away from the evaporator and from the aluminium tubing under the liner — both are thin-walled, and a puncture vents the refrigerant charge in seconds. If you find oil where there should be none, stop: oil outside the tubing means the sealed system is open and the unit should be switched off rather than left running.
Models in the HS family
Reference| Model number | Family key |
|---|---|
| HS-772FWENDT | conservator:refrigerator:hs |
| HS-772FWENDT-R | conservator:refrigerator:hs |
When to call a technician
Call once the airflow and condenser checks are clean, because everything left needs a meter on live terminals or gauges on the sealed system. Call immediately, without finishing the list, if you smell burning, see oil at the compressor or hear the compressor try to start and trip repeatedly — that pattern damages the part that is trying to start.
