Comfort-Aire air conditioners have effectively cooled my home, especially during the scorching summer months. However, I faced a challenge with one unit that suddenly stopped working. Reporting the issue to customer service was straightforward, but the technician’s visit took longer than expected. While the problem was eventually resolved, the extended downtime was an inconvenience.
E01: Evaporator Coil Sensor Error
There’s an issue with the sensor monitoring the evaporator coil’s temperature.
E02: Compressor Error
The compressor is either not running or running inefficiently.
E03: Condenser Coil Sensor Error
There’s an issue with the sensor monitoring the condenser coil’s temperature.
E04: Low Refrigerant
The system has detected a lower than optimal refrigerant level.
E05: Fan Motor Malfunction
The fan motor is not functioning properly, affecting air circulation.
E06: Water Drainage Error
Improper drainage or a blockage has been detected.
E07: High Pressure Warning
The system has detected excessive pressure, which might indicate a blockage or refrigerant overcharge.
E08: Overheating Compressor
The compressor is overheating due to continuous operation or malfunction.
E09: Filter Warning
The air filter needs to be cleaned or replaced for optimal air quality and efficiency.
E10: Electrical Fault
An electrical component or circuitry is malfunctioning.
E11: Remote Control Signal Error
The air conditioner is having difficulty communicating or receiving signals from the remote control.
E12: Defrost Mode Error
There’s a malfunction when the unit tries to enter or exit the defrost mode.
E13: Ambient Temperature Sensor Malfunction
The sensor that gauges the room’s temperature is not working correctly.
E14: Power Supply Inconsistency
There’s a discrepancy or irregularity in the power supply, possibly due to voltage fluctuations.
E15: Refrigerant Leak Detection
The system has detected a possible refrigerant leak.
E16: Internal Component Overheating
A component within the unit, other than the compressor, is getting excessively hot.
E17: Communication Error Between Indoor and Outdoor Units
For split systems, the indoor and outdoor units are having trouble communicating.
E18: Low Pressure Warning
The system is detecting lower than expected pressure, which could be due to a refrigerant leak or other issue.
E19: High Humidity Alert
The unit has sensed elevated humidity levels in the room.
E20: Circuit Board Malfunction
There’s a problem with the air conditioner’s main circuit board, affecting its operation.
E21: UV Lamp Fault
If the unit is equipped with a UV lamp for air purification, this code indicates a malfunction or end-of-life for the lamp.
E22: Airflow Restriction Alert
The system has detected a restriction in airflow, possibly due to a clogged filter or blocked vents.
E23: Compressor Start-up Error
There is a problem with the compressor’s start-up mechanism, which may affect the cooling process.
E24: Sound Level Abnormality
The system is producing abnormal sounds which may indicate mechanical issues.
E25: Coil Overfreeze Alert
The evaporator coil is freezing over more than usual, which can affect the unit’s efficiency.
E26: Overvoltage Warning
The unit is experiencing overvoltage conditions, which can pose risks to the system’s electrical components.
E27: Undervoltage Warning
The unit is experiencing undervoltage conditions, which may cause it to underperform or shut down.
E28: Door or Panel Open Alert
For units with accessible panels or doors, this indicates that one is not securely closed.
E29: Swing Motor Fault
If the unit has oscillating louvers, this error indicates a fault with the swing motor.
E30: EEPROM Error
There’s an issue with the unit’s internal memory, which may affect system settings or configurations.