Sub-Zero Temperature Display Flashing? Power Outage & Alarm Meaning

Updated October 2026 · By the Sub-Zero Repair Las Vegas service team

Quick answer

A flashing temperature display on a Sub-Zero usually means a power interruption or a temperature event occurred. The display often shows the warmest temperature reached. Press a key to acknowledge, check food safety, and monitor the unit. If it keeps flashing or temperatures don't recover, have it checked.

Applies toClassic, Designer, PRO, wine

Typical fixDIY

Service call$75

What It Means

After a power loss, or after a compartment warmed significantly, many Sub-Zero controls flash the temperature so you know something happened while you weren't watching.

Common Causes

Power outage or brownout (common during Las Vegas summer storms)
Tripped breaker or GFCI
Unit switched off and back on
High temperature event

What You Can Do

Press any key to acknowledge.
Check food safety. See our food safety guide.
Monitor for 24 hours.
If GFCI trips repeatedly, have the circuit and unit checked.

What a Technician Does

If the event repeats without a power outage, we look for the cause of the temperature rise and check electrical connections.

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FAQ

Frequently Asked Questions

Does a flashing display mean my Sub-Zero is broken?

Not necessarily. Most often it's a power interruption. If temperatures recover and it doesn't recur, no repair is needed.

Alert / codeSub-Zero High Temperature AlarmA compartment is too warm.Refrigerator problemSub-Zero Not Turning OnNo lights, no display.GuideFood Safety After a Refrigerator FailureWhat to keep and what to toss.Alerts & codesSub-Zero Error Codes & AlertsEvery Sub-Zero alert explained.

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Sub-Zero Flashing Temperature Display