Not cooling · Which part of it is warm?
Why Is My Fridge Warm When the Freezer Is Fine?
- Signed
- Dean Halvorsen
- Role
- Refrigeration technician — sealed systems and airflow
- Certification
- EPA Section 608 certified
- Published
Short answer
Because a built-in Sub-Zero cools its two sections separately, and only the fridge side is struggling. Combination units run two compressors and two cooling systems, so a solid freezer narrows the search to one side before any panel comes off. Sub-Zero Repair Edmonds checks it for the $89 service call: (206) 210-3547.
What the split tells you
A built-in Sub-Zero with a fridge and a freezer in one cabinet has two separate sealed systems (the compressor, the coils and the refrigerant sealed between them), one per section. A freezer that is still hard proves its own system works, and puts the fault on the fridge side. That side has only a handful of ways to go warm, listed here in the order they are ruled out:
- The door, or the light. A door held a fraction open by a shelf edge lets room air in all day, and a light switch that no longer puts the lamp out leaves it warming the shelves with the door shut.
- The evaporator fan (the small fan behind the back panel that pushes cold air off the coil and into the compartment). When it stops, the coil stays cold and the shelves do not.
- A coil that has iced solid. If the fridge side’s defrost fails, frost packs the coil until air cannot pass through it. The unit keeps running and the compartment still warms.
- The condenser (the coil behind the grille that throws the heat out). Dust on it hurts both systems, so it is checked but seldom the whole answer.
- The fridge side’s own compressor or refrigerant. Possible, but tested last.
What a technician checks
Both compartments are probed, so the split is measured rather than guessed. The door, the light switch and the fans are checked with the fridge-side compressor running, and the back panel comes off to show whether the coil is clear or iced. Gauges come last: Sub-Zero’s service manual reads pressures only once the mechanical and electrical parts are ruled out, and so do we.
That two-system layout is how Sub-Zero builds its built-in combinations. For a column, a drawer unit or an older model, give the model number when you call.
What it may cost
$89 to find out — the visit and the diagnosis, taken off the repair if you go ahead.
- Evaporator or condenser fan motor Shows as a fan that has gone quiet behind the grille, or cold coils behind a warm shelf $340–$700
- Defrost heater, thermostat or sensor Shows as a back panel iced over, or a warm fridge sitting above a freezer that still works $290–$690
Ranges, not starting prices. The technician names one figure inside the band before any panel comes off, and Sub-Zero Repair Edmonds holds to it.
Wait or call today?
Can wait until morning
- The fridge thermometer reads 40°F or colder and the freezer is hard: keep both doors shut and book the first visit that suits you.
- Milk, meat and leftovers have gone into the freezer or a cooler with ice, so nothing perishable depends on the warm side overnight.
- The door has been opened all day: give it a few hours shut before judging the temperature.
Call today if
- The fridge reads above 40°F. The FDA says perishables held above 40°F for four hours or more should be thrown out.
- The compressor clicks every few minutes without ever starting, or the unit hums and then goes quiet.
- There is a chemical smell, or the freezer has started to soften too.
Anything in the second card is a reason to phone Sub-Zero Repair Edmonds on (206) 210-3547 today rather than tomorrow.
Questions people ask next
Can I sort out a warm fridge side myself?
Partly. Check that the door closes against its gasket all the way round, that no jar or shelf edge holds it open, and that pressing the light switch in the frame puts the light out. Clear anything blocking the grille. Beyond that the checks need panels off, which is work for Sub-Zero Repair Edmonds on (206) 210-3547.
Will turning the fridge colder on the control fix it?
Not for long. If a fan has stopped or the coil behind the back panel has iced over, a colder setting only asks the failed part to work harder, and the freezer, on its own system, gains nothing. Put the control back near 38°F, the setting Sub-Zero recommends for a refrigerator, and have the cause found.