The short answer
On the GRMH line, the most common reason a refrigerator is not cooling is evaporator fan motor failed or obstructed. 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 GRMH line
- 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.
- Food spoiling faster than the display suggests it should — Trust a thermometer on a shelf over the panel reading; a failed sensor lies to the panel first and to you second.
- The cabinet is warm but the unit is clearly running — The compressor hum is there and the light comes on, yet the air inside is no colder than the room after several hours.
- NEAR MISS — it cools but rattles, hums or buzzes — A noise complaint on a unit that still reaches temperature belongs on the noise page for this appliance, not here.
Causes, most likely first on the GRMH line
- Evaporator fan motor failed or obstructed — The fan behind the freezer panel is the only thing moving cold air into the fresh-food compartment. When it stops the evaporator carries on getting cold and the shelves carry on getting warm. It ranks high because it is the cheapest part in the chain and because it is the usual explanation for a freezer that is fine above a refrigerator that is not. Five 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 — Ice accumulates on the evaporator coil until air can no longer pass through it. Cooling capacity is still being made; it simply cannot reach the shelves, which is why the compressor runs on and on. 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 ranks last on purpose: it is rare, it is expensive, and every cause above it has to be cleared before it is a fair conclusion.
Check in this order, and why
- First: Open the freezer and listen with the door switch held in — Silence from the freezer compartment while the compressor runs is the tell. 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 — Ice visible around the panel seams settles the question before any tool comes out.
- Third: Only after the checks above: is the condenser cold and the evaporator dry? — A condenser that never gets warm while the compressor runs points this way. Stop there and call.
Before you open anything
Safety
Switch the unit off at the breaker before any panel comes off, and remember a capacitor can stay charged afterwards. Pull the unit out slowly and with help rather than walking it on its corners, because a loaded cabinet is far heavier than it looks and the compressor mounts do not like being dropped. Nothing on this page asks you to open the refrigerant circuit, and nothing should: that is licensed work and the pressure inside is real.
Models in the GRMH family
Reference| Model number | Family key |
|---|---|
| GRMH141A* | conservator:refrigerator:grmh |
| GRMH141B* | conservator:refrigerator:grmh |
| GRMH183** | conservator:refrigerator:grmh |
| GRMH183U* | conservator:refrigerator:grmh |
| GRMH185A* | conservator:refrigerator:grmh |
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.
