Sub-Zero Wine Coolers Error Codes

EC06

Wine cooler displays EC06 and may not respond correctly to user inputs; display may freeze or behave erratically.

User Interface / Control Panel Communication Fault

EC07

Wine cooler displays EC07 and may not cool or may shut down unexpectedly; internal lights and fans may still operate.

Main Control Board Fault

EC08

Wine cooler displays EC08 and may not maintain set temperature; compressor or fans may not run as commanded.

Low Voltage or Power Supply Fault to Control Board

EC20

Wine cooler displays EC20 and may not cool; compressor may be locked out due to high temperature or pressure condition.

High Temperature / High Pressure Protection Fault

EC21

Wine cooler displays EC21 and may show temperature alarms; unit may run excessively or not reach setpoint.

Cabinet High Temperature Alarm / Cooling Performance Fault

EC22

Wine cooler displays EC22 and may show low temperature alarms; product may be colder than setpoint or partially frozen.

Cabinet Low Temperature Alarm / Overcooling Fault

EC23

Wine cooler displays EC23 and may have issues with defrost timing or fan operation; frost patterns may be abnormal.

Evaporator Sensor / Defrost Sensor Fault

EC24

Wine cooler displays EC24 and may show erratic or incorrect temperature readings; cooling may cycle improperly.

Compartment Temperature Sensor (Thermistor) Fault

EC25

Wine cooler displays EC25 and may not maintain proper condenser temperature; unit may shut down or run continuously.

Condenser Temperature Sensor Fault

EC26

Wine cooler displays EC26 and may show issues with door status; interior lights or fans may not behave correctly.

Door Switch / Door Status Fault

EC27

Wine cooler displays EC27 and may have lighting issues; interior lights may flicker, stay on, or not turn on.

Lighting Circuit Fault

EC28

Wine cooler displays EC28 and may not respond to temperature adjustments; setpoints may not change or may revert.

Control Calibration / EEPROM Fault

EC29

Wine cooler displays EC29 and may have communication issues between multiple zones or modules; one zone may not cool.

Inter‑Module Communication Fault

EC30

Wine cooler displays EC30 and may not cool; compressor may not start or may short-cycle.

Compressor Start/Run Circuit Fault

EC31

Wine cooler displays EC31 and may show erratic humidity or temperature control in a specific zone.

Zone Sensor or Zone Control Fault

EC32

Wine cooler displays EC32 and may not cool one of the zones; fans or dampers for that zone may not operate.

Zone Evaporator or Fan Control Fault

EC33

Wine cooler displays EC33 and may have issues with the mullion or frame heater; condensation may form around door frame.

Anti‑Condensation Heater Circuit Fault

EC34

Wine cooler displays EC34 and may have issues with internal communication or configuration; multiple functions may be affected.

Configuration / Option Board Fault

EC35

Wine cooler displays EC35 and may have issues with the door heater or anti‑sweat function; condensation may appear on glass door.

Door Glass Heater Fault

EC36

Wine cooler displays EC36 and may have issues with a secondary or auxiliary sensor; performance may be slightly off but unit may still run.

Auxiliary Sensor Fault

EC37

Wine cooler displays EC37 and may have issues with fan speed control; fans may run at incorrect speeds or be noisy.

Fan Speed Control Fault

EC38

Wine cooler displays EC38 and may have issues with internal communication between display and control; intermittent operation.

Display to Main Board Communication Fault

EC39

Wine cooler displays EC39 and may have issues with internal diagnostics; unit may default to safe mode with limited operation.

Internal Diagnostic / Self‑Test Fault

EC40

Wine cooler displays EC40 and may not cool properly; fans may run but temperatures drift warm.

Evaporator Fan Circuit Fault

EC50

Wine cooler displays EC50 and may not defrost properly; frost buildup on evaporator and poor cooling performance.

Defrost Heater or Defrost Circuit Fault

Symptom

Dual‑zone wine cooler has one zone cooling properly while the other zone is warm.

Single Zone Failure – Zone Fan or Damper Issue

Symptom

Excessive condensation or moisture on the inside of the glass door or interior walls.

Condensation – Door Seal or Heater Issue

Symptom

Frost or ice buildup on the back wall or around the evaporator area inside the wine cooler.

Frost Buildup – Defrost or Door Seal Problem

Symptom

Interior lights not working even when the door is open; display may still function.

Lighting Failure – LED Module or Door Switch

Symptom

Interior lights stay on even when the door is closed; cabinet may warm up.

Lighting Stuck On – Door Switch or Control Fault

Symptom

Water leaking inside the wine cooler; puddles form on the bottom of the compartment.

Internal Leak – Clogged Defrost Drain

Symptom

Water leaking onto the floor from under or in front of the wine cooler.

External Leak – Drain Pan or Condensation Issue

Symptom

Wine cooler cycles on and off frequently; compressor starts and stops more often than expected.

Short Cycling – Control or Load Issue

Symptom

Wine cooler display works but buttons do not respond or respond intermittently.

Unresponsive Controls – User Interface Failure

Symptom

Wine cooler door does not close or seal properly; door may pop open slightly after closing.

Door Alignment or Gasket Failure

Symptom

Wine cooler emits a chemical, burning, or electrical smell during operation.

Overheating Electrical Component

Symptom

Wine cooler emits a strong musty or moldy odor inside the cabinet.

Odor – Biological Growth in Drain or Interior

Symptom

Wine cooler is noisy; loud humming, rattling, or buzzing sounds during operation.

Excessive Noise – Mechanical Vibration or Failing Fan

Symptom

Wine cooler is too cold; bottles or labels may show signs of freezing, especially near the back.

Overcooling – Sensor or Airflow Imbalance

Symptom

Wine cooler is vibrating excessively; bottles rattle on shelves during compressor or fan operation.

Excessive Vibration – Leveling or Fan Imbalance

Symptom

Wine cooler makes a loud banging or knocking noise when the compressor starts or stops.

Compressor Mount or Tubing Knock

Symptom

Wine cooler not cooling at all; interior is warm, lights may work, but compressor and fans are not running.

No Cooling – Control or Power Supply Failure

Symptom

Wine cooler runs constantly but does not reach set temperature; interior is cool but not cold enough.

Poor Cooling – Sealed System or Airflow Problem

Symptom

Wine cooler temperature display is inaccurate; actual bottle temperature does not match the setpoint.

Temperature Inaccuracy – Sensor or Calibration Issue

Symptom

Wine cooler will not start or respond to controls; display is blank or dim.

No Power – Electrical Supply or Control Failure