The short answer
A GSN freezer that runs constantly and still lets the contents soften is nearly always losing airflow rather than refrigerant: the evaporator ices over, the air stops moving, and the cabinet warms while the compressor works harder. This designation covers a single cabinet with one defrost arrangement, so the defrost system is taken first for both of the faults covered for these models. A freezer holds food safely at 0 °F (−18 °C) or below, so the first decision is about the food.
What owners of these models see
- The contents are soft while the appliance is clearly running — Ice cream gives to a spoon and packaging is pliable, with the compressor audible the whole time.
- A sheet of frost has built on the back wall inside — Not the usual light dusting but a solid covering, sometimes thick enough to hide the vents behind it.
- It never cycles off — A freezer that runs without pause is one that never reaches the temperature it is aiming at, which is the same fault seen from outside.
Causes, most likely first on GSN models
- A stalled defrost cycle icing the evaporator — This is the brand-generic order, and it holds here for a reason of its own: this designation is a single cabinet with one defrost arrangement, and the defrost system explains both of the faults covered for it. The evaporator frosts on every cycle by design and is cleared by the defrost system. When that stops, ice builds until the air can no longer pass. It is the commonest cause of this exact pattern and the frost sheet on the back wall confirms it.
- A failed evaporator fan — The fan moves cold air through the cabinet. If it stops, the evaporator gets very cold and the cabinet does not, often with no frost sheet to show. It presents as air that has stopped moving, exactly as a stalled defrost does.
- A sealed-system or compressor fault — Lost refrigerant or a compressor that no longer pumps gives a cabinet that runs and never cools, with no frost and a condenser that stays cool. It is the least likely of these and the only one that is not an owner matter at any stage.
What to check first on these models
- Listen at the cabinet for the fan while the appliance is running — The order follows the platform rather than the symptom. Every step eliminates a candidate, which is what stops the next one being a guess. Silence with a running compressor separates the two likeliest causes before any panel is touched.
- Run a hand round the door seal with the appliance running — Cold air escaping or frost at one point tells you where the humidity is coming in.
- Move anything perishable first, then start diagnosing — A freezer holds food safely at 0 °F (−18 °C) or below. Below that line the food decision comes before the appliance decision, every time.
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 freezer holds food safely at 0 °F (−18 °C) or below, and anything above that line for long is judged on food-safety grounds. Never chip ice off an evaporator with anything sharp: the tubing behind it is thin. These cabinets are heavy, so moving one is a two-person job.
When to call a technician
Clearing the condenser area, checking the seal and listening for the fan are owner work on these models. A defrost heater, a defrost sensor, a fan motor or a control is a service call, and anything on the sealed system is licensed work. Call now if the cabinet has been warm for a day, if it never stops running, or if there is oil around the tubing at the back.
Other faults covered for GSN models
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
