The short answer
What this symptom means on an Upstreman refrigerator depends on how the refrigerator is built, and on this one the order runs like this. First — Frost built up on the cooling plate. Last, and the only one that is a technician's job from the outset — A sealed-system or compressor fault. Start at the top: those checks are free and need nothing opened.
What you actually observe
- The cabinet is warm but the unit is clearly running — You can hear the compressor; the air inside is not cold.
- It never switches off — It runs without ever satisfying its thermostat, which is the same fault seen from the other side.
- One part of the cabinet is cold and another is not — That is an airflow pattern rather than a cooling failure.
- NEAR MISS: the unit is silent and nothing is cold at all — That is a no-power or start-relay fault and it belongs on a different page.
Causes, most likely first on this build
- Frost built up on the cooling plate — On a manual-defrost cabinet the cooling plate frosts over in ordinary use, and once the frost is thick it insulates the plate from the air it is meant to be chilling. Ranked first on an Upstreman: a compact cabinet with a manual-defrost chill box collects ice quietly for weeks before the owner notices the warmth.
- No clearance behind or above the cabinet — The condenser rejects the cabinet's heat into the air around it, so a unit pushed against a wall or shut into a cupboard re-breathes its own exhaust. Second here, because these units are placed on a desk, a shelf or a carpet rather than installed, so clearance and level are wrong far more often than a part is.
- A failed evaporator fan — The fan is what moves chilled air out of the evaporator and around the cabinet. Third, once the two above are clean: it costs nothing to rule out and it decides whether anything needs to come apart at all.
- A sealed-system or compressor fault — A refrigerant leak or a failed compressor leaves nothing to carry the heat away. Last, and the reason the order above matters: it is the rarest cause on a small sealed system and the only one an owner cannot touch, so it belongs at the bottom of the list.
Check in this order, and why
- Look at the cooling plate or the freezer compartment for frost — A thick sheet rather than a light dusting names the cause before any tool comes out.
- Measure nothing, just look at what is behind and above the cabinet — If you cannot get a hand behind it, neither can the air it needs.
- Listen at the freezer compartment with the door held open and the switch pressed in — A fan that should be running and is not separates two very different repairs.
What an owner can safely check
- Give the cabinet a hand's width of clear air at the back and above it, then run it for a day — Compact cabinets are placed rather than installed, and clearance is the check that is skipped every time.
About 25 min
- Empty the cabinet, switch it off and leave the door open until every trace of frost is gone — No tools.
About 45 min
- STOP HERE if the next step needs a meter on live terminals or any work on the sealed system — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel, because a capacitor can hold a charge after the power is off. Leave the door switch wired exactly as it is: it cuts power to the fan for a reason, and defeating it is never part of a diagnosis.
When to call a technician
Call once the clearance, the coil, the gasket and the load inside are all clean and the cabinet still will not hold its band, or the moment the fault is on the sealed system: refrigerant work is licensed and the tools for it are not owner tools. Call immediately if you smell burning, or see oil around the compressor, because oil outside the tubing means the system is open and every hour it runs after that costs more to put right.
Where to go next in this class
What is deliberately not on this page
This page is written for the Upstreman refrigerator as a class, not for one family or model line. Where a family- or model-specific page exists for your cabinet it is linked above, and it is the more specific answer.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
