Error Code Reference
High-End Appliance Error Codes
A single reference for fault codes across Sub-Zero, Wolf, Viking, Thermador, KitchenAid, and GE Monogram — what each one means, and what to do next.
Error codes · 6 brands
A single reference for fault codes across Sub-Zero, Wolf, Viking, Thermador, KitchenAid, and GE Monogram — what each one means, and what to do next.
Error codes · 6 brands
All 228 documented codes across 6 brands are live.
142 codes & faults across refrigerators, freezers, and ice/water systems.
Cooking16 codes & faults across ranges, ovens, and cooktops.
Full Kitchen16 codes & faults across cooking and refrigeration.
Full Kitchen18 codes & faults across cooking, dishwashing, and refrigeration.
Full Kitchen18 codes & faults across refrigerators, ranges, and dishwashers.
Full Kitchen18 codes & faults across refrigeration, cooking, and speedcook ovens.
A quick sample of what’s covered — every code below links to a full breakdown of what it means, what’s usually behind it, and what’s safe to check yourself first.
| Code | Brand | What It Means |
|---|---|---|
| 05 | Sub-Zero | Refrigerator cabinet thermistor reading open or shorted |
| 20 | Sub-Zero | Defrost under-heat with no voltage feedback at defrost start |
| 15 8 00 | Sub-Zero | Icemaker relay stuck open, no power to icemaker |
| 35 R 33 | Sub-Zero | Refrigerator evaporator fan obstructed, can’t reach full speed |
| 40 1 38 | Sub-Zero | Refrigerator stepper valve communication fault |
| 50 | Sub-Zero | Excessive refrigerator compressor run time |
| 30 | Sub-Zero | Excessive icemaker water valve solenoid activation |
| 44 0 00 | Sub-Zero | Glass door heater open circuit |
| 45 A 45 | Sub-Zero | Air filter light burned out |
| d0 0r | Sub-Zero | Door ajar alarm — door left open more than 5 minutes |
| 90 H 82 | Sub-Zero | Intermittent communications on main board |
A flat $99 diagnostic fee — waived when you move forward with the repair.
Every brand stores fault codes a little differently, but the concept is the same: the control board detects a reading or component behavior outside its normal range and stores a code, often alongside an indicator light. Our brand-specific code pages explain what each one means and how it’s typically displayed on your model.
No — even when the numbers look similar, the same code can mean something completely different on a Sub-Zero versus a Wolf or Viking unit. Always check the code against the correct brand’s list.
Power-cycling the unit clears many codes temporarily, but if the underlying cause hasn’t been fixed, the code returns. Clearing a code isn’t the same as fixing what triggered it.
It depends entirely on what’s actually wrong — a $99 diagnostic confirms the cause and gets you a written price before any repair begins, waived if you move forward. If your unit is still under an active manufacturer warranty, we’ll let you know and point you to the authorized network, since we specialize in out-of-warranty repairs.
All 6 brands: Sub-Zero, Wolf, Viking, Thermador, KitchenAid, and GE Monogram — 228 documented codes in total. Use the brand cards above to find yours.
Use the brand cards above, or jump straight to the Sub-Zero error code list if that’s your brand — it’s organized by fault type with a full breakdown for every code.
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