What this usually is
On the F family, a cabinet that runs but will not hold temperature usually comes down to stalled defrost. The first check that pays is this one: look at the freezer rear panel for a frost sheet.
The symptoms, including the ones that mean something else
- The compressor runs and never cycles off — A healthy unit stops for a while once it reaches temperature.
- A sheet of frost on the freezer rear wall — Not the light dusting that comes and goes, but a solid white sheet that grows back within a day of being scraped off.
- The freezer side is cold and the fresh-food side is not — On a two-compartment cabinet the cold is made in one place and moved to the other, so this split points at airflow rather than at cooling.
- NEAR MISS: it cools but there is water on the floor — Cold plus water is a drain or seal problem, and the water leak page for this line covers it properly.
Causes in order of likelihood here
- Stalled defrost, with the evaporator iced over — It leads on a two-compartment cabinet in particular, because the freezer keeps working while the fresh-food side starves, and that split is the single most reported version of this fault.
- Condenser coil blocked, or starved of clearance — Compact and under-counter cabinets carry their condenser at the back or in the side wall with very little air gap, so dust and a tight installation cost them cooling faster than they cost a full-size unit.
- Evaporator fan not moving air — It ranks below defrost because a stopped fan usually announces itself: the cabinet goes warm quickly rather than drifting, and the freezer often stays cold while everything else does not.
- Sealed system or compressor fault — It earns its place at the bottom rather than off the list, because a cabinet that has been running warm for months is also the one most likely to have worked its compressor to death.
- Body: The table below shows what the F family actually is: the same cabinets listed repeatedly in different finishes, with the numeric part of the model number separating the sizes. Finish does not change how a cabinet fails, so the useful differences across this list are size and age rather than specification.
The diagnostic order
- Look at the freezer rear panel for a frost sheet — A solid sheet where the cold air leaves the freezer confirms the airflow path is blocked before any tool comes out.
- Feel the back or the side panel while the unit is running — Warm is right; scorching, with no clearance behind and a dusty coil, is the answer.
- Listen at the freezer with the door switch held in — Air noise that stops when you release the switch means the fan is alive; silence with the switch held is the fan.
- Body: The order follows the ranking above rather than the layout of the cabinet: each check either confirms the cause above it or removes it, and they are arranged so that the free checks come before anything that needs the unit moved or a panel off. Access is the same across the models in the table, so the order holds for all of them.
Before any panel comes off
Safety
Disconnect power at the plug or the breaker before opening anything, and treat the compressor area as live until it is. Capacitors hold charge, the relay terminals are exposed, and the underside of a compact cabinet puts all of it at knee height.
Models in the F family
Reference| Model number | Family key |
|---|---|
| F4506S | antarctic-star:refrigerator:f |
| F5846-BLACK | antarctic-star:refrigerator:f |
| F5890B-BLACK | antarctic-star:refrigerator:f |
| F5890GN-GREEN | antarctic-star:refrigerator:f |
| F5890GY-GRAY | antarctic-star:refrigerator:f |
| F5890R-RED | antarctic-star:refrigerator:f |
| F5890W-WHITE | antarctic-star:refrigerator:f |
| F6840-BLACK | antarctic-star:refrigerator:f |
| F6840-SILVER | antarctic-star:refrigerator:f |
| F6848-BLACK | antarctic-star:refrigerator:f |
| F6848-GREEN | antarctic-star:refrigerator:f |
| F6848-WHITE | antarctic-star:refrigerator:f |
| F6891-BLACK | antarctic-star:refrigerator:f |
| F6891-GREEN | antarctic-star:refrigerator:f |
| F6891-WHITE | antarctic-star:refrigerator:f |
When this becomes a service call
Call when the cheap causes are all eliminated and the cabinet still drifts warm, and call without working through them at all if the symptom arrived suddenly with a bang, a burning smell or a tripped breaker. A unit that has been running warm for weeks is also worth a call rather than a wait: a compressor that never cycles off is working far harder than it was built to, so a cheap fault left alone is the usual way an inexpensive repair becomes an expensive one.
Other faults covered here
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
