Skip to main content
Error code reference
Sub-Zero Refrigerator Error Code 50 U 90
Flow meter framing errors.
SourceSub-Zero Original (7011904): Prior to Serial 4100000: Service Manualp. 3-37, 3-38
Diagnostic procedure
The full 50 U 90 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
Check flow meter wiring and connections.
SourceSub-Zero Original (7011904): Prior to Serial 4100000: Service Manualp. 3-37, 3-38
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock 50 U 90 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
4 manuals in the MyPros+ library document this code for Sub-Zero refrigerator.
Models covered by the manuals that document this code
- BI-36F
- BI-36R
- BI-36S
- BI-36U
- BI-42S
- BI-42SD/O
- BI-42SD/S
- BI-42SD/S/CH
- BI-42SD/S/PH
- BI-42SD/S/TH
- BI-48S/O
- BI-48S/S
- BI-48S/S/CH
- BI-48S/S/PH
- BI-48S/S/TH
- BI-48SD
- ICBBI-30U/O-LH
- ICBBI-30U/O-RH
- ICBBI-30U/S/PH-LH
- ICBBI-30U/S/PH-RH
- ICBBI-30U/S/TH-LH
- ICBBI-30U/S/TH-RH
- ICBBI-30UG/O-LH
- ICBBI-30UG/O-RH
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