Sub-Zero Fridge Runs Constantly
Fridge Runs Constantly 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
Elevation, in almost every direction
Less oxygen for combustion, less air mass over a condenser and a boiling point near 202°F all change what a symptom means here.
A specific failed component rather than the whole unit
Most single-symptom issues trace back to one part, not a systemic failure.
Wear on parts that see the most daily use
Moving parts and seals typically fail before electronic or structural components.
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 Niwot
Niwot — Unincorporated Boulder County community platted in 1875; Old Town holds early-1900s homes in a county-designated historic district, Cottonwood Square is 1970s-90s ranches and split-levels, and Somerset Estates and Legend Ridge are large-lot customs. We also cover Erie, Lafayette, Longmont across Boulder County.
ZIP codes we cover in Niwot: 80503, 80544
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 Fridge Runs Constantly
Can I keep using my Sub-Zero appliance while this happens?
Will fridge runs constantly 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 Denver 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.