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When an NLS unit stops cooling, the useful split is whether it makes no cold at all or makes cold it cannot distribute. A unit can be working perfectly and still fail in the position it has been put in, and that distinction decides everything that follows. The order below puts an ambient temperature outside what the unit can handle first and a loss of refrigerant charge last, and that order is the point of the page.
The observables
- A hum or a click every few minutes and no sustained run — Something attempts to start and drops out, and the machinery end never warms.
- The panel is lit and nothing ever starts — The electronics are alive but no cooling is ever called for.
- It was fine until the weather turned — The same unit in the same place, coping in spring and failing in a hot room.
- NEAR MISS - cold enough but noisy — Noise with normal temperatures is a mounting or contact problem, not a cooling problem, and it has its own page.
Causes, most likely first on this line
- An ambient temperature outside what the unit can handle — Ranked first on this line: every refrigerator is rated to work within a range of room temperatures, and outside that range it either runs without stopping or stops cycling sensibly. A hot room, direct sun or an enclosed cupboard all do this.
- The condenser unable to shed heat — It ranks high because it is both the commonest cause of continuous running and the one an owner can fix completely in ten minutes.
- A door or lid that is not sealing — Then: on a compact cabinet the ratio of door to volume is large, so a leak that would be tolerable on a full-size refrigerator is decisive here.
- A loss of refrigerant charge — Last, and the reason the order matters: a system that has lost its charge runs continuously, stays quiet, and produces little or no cold at the plate. It is the least likely cause and the only one that decides whether the unit is worth keeping.
The order to work in
- Measure the room, not just the cabinet — Measure the room temperature where the unit actually stands, not in the middle of the house, and look for sun on the case during the day.
- Give the condenser air and a clean grille — Feel the machinery end while it runs: it should be warm. A unit running continuously with a cool condenser has a different problem from one running continuously with a hot one.
- Test the seal at several points — Close the door on a strip of paper at the top, the middle and the bottom of each side and pull. Anywhere it slides out freely is a leak, and the coldest part of the cabinet will be furthest from it.
Before any panel comes off
Safety
Unplug the appliance or switch off its breaker before removing any panel - a capacitor can hold a charge after the power is off. Do not defeat a door switch to keep the cabinet running with the door open while you test; use a thermometer instead.
Models in the NLS family
Reference| Model number | Family key |
|---|---|
| NLS35 | alpicool:refrigerator:nls |
| NLS45 | alpicool:refrigerator:nls |
| NLS55 | alpicool:refrigerator:nls |
When this stops being owner work
Call once the supply, the clearance, the seal, the setting, the load and the frost are all clean and the cabinet still makes no cold: what is left is the machinery. Call immediately if you find oil at the machinery end, or if a breaker trips when the unit starts.
Same line, other symptoms
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
