Error code reference

Sub-Zero Refrigerator Error Code 55

Zone thermistor is shorted in the indicated zone.

SourceSub-Zero Original: Prior to Serial 1670316: Service Manualp. 2-14, 5-4, 5-6

Sub-Zero codes Sub-Zero refrigerator codes

Diagnostic procedure

The full 55 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Repair wiring or replace thermistor. Turn unit OFF at master power switch for 10 seconds, then back ON to clear error mode.

SourceSub-Zero Original: Prior to Serial 1670316: Service Manualp. 2-14, 5-4, 5-6

Unlock with pass

More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

Unlock 55 procedure $9.95

Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.

Where this code is documented

1 manual in the MyPros+ library documents this code for Sub-Zero refrigerator.

Models covered by the manuals that document this code

More models are covered than are listed here.

75,000+ service documents · 20,000+ error codes · 100+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax

The full 55 procedure

Where this code is documented

Models covered by the manuals that document this code

Related Sub-Zero refrigerator error codes