A Sub-Zero freezer that isn't freezing usually has an iced evaporator from a defrost failure, a failed freezer evaporator fan, a door or gasket leak, a dirty condenser or failed condenser fan, or a sealed system problem.
Soft ice cream is usually the first sign. Act quickly: a freezer can lose temperature faster than you'd expect once airflow stops.
Check These First (5 Minutes, No Tools)
- Check the set point (0°F is typical) and that Max Ice isn't the only thing running.
- Close the door on a dollar bill: it should drag when pulled out. Check around the whole gasket.
- Look for frost on the back wall or on food packages.
- Make sure the freezer isn't overpacked against the vents.
- Clean the condenser.
Most Common Causes
| Cause | What happens | Fix |
|---|---|---|
| Defrost failure | Evaporator ices over; airflow blocked. | Pro |
| Freezer fan motor | No air circulation; you may hear scraping or nothing at all. | Pro |
| Gasket / door alignment | Warm, moist air enters; frost builds quickly. | DIY / Pro |
| Condenser airflow | System can't reject heat. | DIY / Pro |
| Sealed system | Low charge, restriction or weak compressor. | Pro |
How We Fix It
We check evaporator frost, test the fan, defrost heater and sensor, inspect the gasket and door alignment, and verify condenser airflow and compressor performance.
When to Call a Technician
If the basic checks above don't solve it within a few hours, or if you hear repeated clicking, see an alarm or service indicator, or notice water under cabinetry, call us at (725) 237-7399. The $75 service call is credited toward your repair, repairs carry a 1-year parts and 180-day labor warranty, and we stock the Sub-Zero parts behind most of these failures.
Typical Cost
| Repair | Typical range |
|---|---|
| Defrost heater / defrost sensor repair | $395 – $745 |
| Evaporator fan motor replacement | $345 – $595 |
| Door or drawer gasket replacement | $295 – $595 |
| Refrigerant leak repair, evacuation & recharge | $995 – $2,150 |
Typical totals for parts and labor in the Las Vegas area. The $75 service call is credited toward your repair, and every repair is backed by a 1-year parts and 180-day labor warranty. Your exact price depends on the model, the part and access, and you approve a firm quote before any work begins. Full price list →
Still Not Working? We Can Help Today.
$75 service call, credited toward your repair · 1-year parts · 180-day labor warranty · EPA 608 certified · Mon–Fri 8am–7pm · Sat–Sun 8am–4pm