Error code reference

Sub-Zero Refrigerator Error Code Control board light - slow flash

Liquid line thermistor is open or disconnected.

SourceSub-Zero Service Manual: UC-15I: Service Manualp. 6-4

Sub-Zero codes Sub-Zero refrigerator codes

Diagnostic procedure

The full Control board light - slow flash 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

Check thermistor connection at the control board; reconnect if disconnected. Check thermistor resistance (30K-33K ohms at ~32°F or 8K-12K ohms at ~77°F). Replace if defective.

SourceSub-Zero Service Manual: UC-15I: Service Manualp. 6-4

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 Control board light - slow flash 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

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 Control board light - slow flash procedure

Where this code is documented

Models covered by the manuals that document this code

Related Sub-Zero refrigerator error codes