Sub-Zero Defrost Drain Clogged
Defrost Drain Clogged is usually one of a small number of specific, repairable causes — here's what to check and when it's worth calling a professional.
Common Causes
A failed defrost heater
Frost accumulates unchecked without a working heater to periodically clear it.
A stuck defrost timer or control board fault
The system that schedules defrost cycles can fail even when the heater itself is fine.
A faulty defrost thermostat
Senses when defrost is needed and complete, and can fail in either the open or closed position.
What You Can Check Yourself
Parts That Most Likely Need Replacing
Based on symptoms like this, these are the components our technicians check first. The exact part depends on your model and what we find during diagnosis.
In and around Oakland
Oakland — A fifth of the housing here predates 1940, and the hills above Highway 13 hold the built-in kitchens -- Montclair, Upper Rockridge and Crocker Highlands -- while the flats run older and denser. We also cover Piedmont across Oakland.
ZIP codes we cover in Oakland: 94601, 94602, 94603, 94604, 94605, 94606, 94607, 94608
Most cases like this are fine to schedule within a day or two, though it's worth having looked at before it gets worse. If you're seeing a code on the display alongside this issue, our Sub-Zero error code guide can help narrow down the cause before we arrive. Either way, our repair service covers same-day diagnosis and a flat-rate quote before any work begins.
Common Questions About Defrost Drain Clogged
Can I keep using my Sub-Zero appliance while this happens?
Will defrost drain clogged go away on its own?
How much does this repair typically cost?
How long does a typical repair visit take?
Do you offer a warranty on the repair?
Do you service Sub-Zero appliances in my area?
Still having this issue?
Same-day diagnosis, genuine OEM-compatible parts, warranty of up to 1 year.
*SubZero Repair Oakland is an independent repair company and is not affiliated in any way with Sub-Zero, Inc., Wolf Appliance, Inc., or any of their distributors. We are not a factory service provider and specialize exclusively in out-of-warranty appliance repairs.