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Complete reference guide with 25+ error codes for Sub-Zero & Wolf appliances, including Sub-Zero, Wolf, Cove. Find your error code below, understand the cause, and learn if it's a DIY fix or needs professional repair.
Parent company: Sub-Zero Group | Also covers: Sub-Zero, Wolf, Cove
Average DIY attempt: $150-400 in tools you may use once, plus the risk of further damage. Our diagnostic visit costs $0 — we find the problem and give you an honest quote.
Licensed & Insured · 90-Day Warranty · Same-Day Service
| Code | Description | Severity |
|---|---|---|
| EC 05 | Inconsistent temperatures Causes: Temperature sensor failure, Control board malfunction, Door gasket leak | high |
| EC 10 | Freezer temperature too high Causes: Evaporator fan failure, Defrost system malfunction, Sealed system issue | high |
| EC 15 | Sealed system leak Causes: Sealed system leak, Refrigerant loss, Corroded tubing | high |
| EC 20 | Defrost under-heated Causes: Defrost heater failure, Defrost thermostat malfunction, Control board issue | medium |
| EC 22 | Wiring or defrost issue Causes: Loose wiring connection, Defrost timer failure, Harness damage | medium |
| EC 30 | Icemaker malfunction Causes: Icemaker motor failure, Water inlet valve issue, Frozen fill tube | medium |
| EC 38 | Compressor issue Causes: Compressor relay failure, Start capacitor issue, Compressor winding fault | high |
| EC 40 | Excessive compressor run time Causes: Condenser dirty, Door seal failure, Ambient temperature | high |
| EC 50 | Compressor running excessively Causes: Low refrigerant, Condenser fan failure, Restricted airflow | high |
| EC 55 | Evaporator thermistor failure Causes: Thermistor open circuit, Wiring harness damage, Connector corrosion | high |
| EC 80 | Variable speed compressor error Causes: Inverter board failure, Compressor winding issue, Power supply fluctuation | high |
| EC 85 | Overpressure on compressor Causes: Blocked condenser, Refrigerant overcharge, Condenser fan failure | high |
| EC 86 | Communication failure between compressor and board Causes: Wiring harness fault, Control board failure, Inverter board malfunction | high |