Skip to main content
Error code reference
Sub-Zero Refrigerator Error Code 20 2 50
Defrost heater open circuit detected.
SourceSub-Zero Service Manual: ICB Integrated Drawer: Service Manualp. 7-7
Diagnostic procedure
The full 20 2 50 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
1
First diagnostic step
Verify wiring and heater. Check heater ohms. Replace heater if necessary.
SourceSub-Zero Service Manual: ICB Integrated Drawer: Service Manualp. 7-7
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock 20 2 50 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
10 manuals in the MyPros+ library document this code for Sub-Zero refrigerator.
Models covered by the manuals that document this code
- BI-30UG
- BI-342S
- BI-342SD
- BI-36F
- BI-36R
- BI-36RA
- BI-36RG
- BI-36S
- BI-36U/S
- BI-36UG
- BI-42
- BI-42S
- BI-48
- BI-48S
- ICBBI-42UFDID/S/PH
- ICBBI-42UFDID/S/TH
- ICBIC-18FI-LH
- ICBIC-18FI-RH
- ICBIC-18FI-RH-FA
- ICBIC-24C-LH
- ICBIC-24C-RH
- ICBIC-24FI-LH
- ICBIC-24FI-RH
- ICBIC-24R-LH
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