50 Comfort Aire Air Conditioner Error Codes

If your Comfort-Aire air conditioner just displayed an error code and stopped working, this page is exactly where you should be.

We have prepared a complete guide for you where you can learn about the meanings of all the error codes of Comfort-Aire air conditioners.

Comfort Aire AC error code E0 (indoor)

Error code E0 indicates an indoor unit EEPROM parameter error.

Comfort Aire AC error code E1 (outdoor)

This error occurs due to high-pressure protection. The LED flashes for once.

Comfort Aire AC error code E2 (system error)

The whole unit shuts down for anti-freeze protection. The LED flashes 2 times.

Comfort Aire AC error code E3 (outdoor)

It is due to low-pressure protection. The indicating LED flashes 3 times.

Comfort Aire AC error code E4 (outdoor)

It is an outdoor error due to high discharge temperature protection. The LED flashes 4 times.

Comfort Aire AC error code E5

This error code means whole unit overcurrent protection.

Comfort Aire AC error code E6 (indoor and outdoor)

It is a communication error that can occur both indoors and outdoors. The indicating LED flashes 6 times in case of this error.

Comfort Aire AC error code E7 (operation status)

Error code E7 means mode conflict.

Comfort Aire AC error code E8

This error code means overload protection.

Comfort Aire AC error code E9 (indoor)

The E9 code means indoor unit water full error. It causes the indicating LED to flash 9 times.

Comfort Aire AC error code EE (hardware problem)

The error code EE indicates a malfunction of the memory chip.

Comfort Aire AC error code F0 (special mode)

The F0 code means refrigerant recovery mode. The running LED and the cooling LED flashes quickly. It happens when the refrigerant is low.

Comfort Aire AC error code F3 (outdoor)

This error code appears due to an outdoor ambient temperature sensor error. The cooling LED flashes 3 times.

Comfort Aire AC error code F4 (outdoor)

It occurs due to an outdoor mid-coil temperature sensor error. The cooling LED flashes 4 times in case of error F4.

Comfort Aire AC error code F5 (outdoor)

The error F5 occurs due to an outdoor discharge air temperature sensor error. The cooling LED flashes 5 times.

Comfort Aire AC error code F7 (special mode)

Error code F7 means oil return for cooling.

Comfort Aire AC error code H1 (special mode)

Error code H1 means forced defrosting. The indicating running LED flashes quickly.

Comfort Aire AC error code H2 (special mode)

Error code H2 means oil return for defrosting or heating. The indicating heating LED flashes 1 time.

Comfort Aire AC error code H3 (driver error)

Error code H3 occurs due to compressor overheating OR overload protection. The indicating heating LED flashes 3 times.

Comfort Aire AC error code H5 (driver error)

This error is caused by IPM protection. The heating LED flashes 5 times.

Comfort Aire AC error code H6 (hardware malfunction)

This error occurs due to feedback without an IDU motor.

Comfort Aire AC error code H7 (driver error)

The H7 error is caused due to motor desynchronizing. The indicating heating LED flashes 7 times.

Comfort Aire AC error code HC (driver error)

This is a PFC error. The heating LED flashes 6 times.

Comfort Aire AC error code LC (driver error)

This error occurs due to startup failure. The indicating LED flashes 11 times when this error occurs.

Comfort Aire AC error code LA (outdoor)

This error is caused due to an error in the DC fan motor.

Comfort Aire AC error code LD (driver error)

This problem occurs due to phase loss. The indicating LED flashes 3 times.

Comfort Aire AC error code LE (driver error)

This error code appears due to stalling of the compressor. The LED flashes 3 times.

Comfort Aire AC error code LF (driver error)

This error code appears due to over-speed. The indicating LED flashes 3 times.

Comfort Aire AC error code P0 (driver error)

The P0 error is caused by the IPM reset. The indicating LED flashes 3 times.

Comfort Aire AC error code P5 (driver error)

Error P5 is caused by compressor current protection. The indicating heating LED flashes 15 times to indicate this error.

Comfort Aire AC error code P6 (driver error)

When there is a communication problem between the main controller and the inverted drive, it leads to error code P6.

The running LED flashes 16 times to signal this error.

Comfort Aire AC error code P7 (driver error)

This is a radiation temperature sensor error. The indicating heating LED flashed 18 times to signal this error.

Comfort Aire AC error code P8 (driver error)

The P8 error occurs due to radiator overheating protection. It causes the indicating heating LED to flash 19 times.

Comfort Aire AC error code P9 (driver error)

The P9 error is due to AC contactor protection. The running LED and cooling LED flash 3 times when this error occurs.

Comfort Aire AC error code PC (driver error)

This error occurs due to a problem with the current sensor. The indicating LED flashed 12 times.

Comfort Aire AC error code PD (driver error)

This error code appears due to sensor connection protection. The running and cooling LEDs flash 3 times.

Comfort Aire AC error code PH (driver error)

This error code is displayed because of over-voltage protection. The cooling LED flashes 11 times when this error occurs.

Comfort Aire AC error code PL (driver error)

This error occurs because of low voltage protection. The LED flashes 21 times to notify you about this error.

Comfort Aire AC error code PE (driver error)

This error code appears due to temp drift protection. The running and cooling LEDs flash 3 times to alert you about the error.

Comfort Aire AC error code PF (driver error)

When there is an error in the drive board ambient temperature sensor, it leads to the error code PF being displayed on the screen.

Comfort Aire AC error code PA (driver error)

This error code appears due to AC’s current protection. The running LED flashes 5 times.

Comfort Aire AC error code PU (driver error)

This error is caused due to charging circuit error. The indicating heating LED flashes 17 times.

Comfort Aire AC error code PP (driver error)

The error PP occurs due to an AC input voltage anomaly. The running and cooling LEDs flash 3 times.

Comfort Aire AC error code C5 (hardware malfunction)

It is a hardware problem that occurs due to the malfunctioning protection of the jumper cap.

Comfort Aire AC error code B5 (hardware malfunction)

This error occurs when the liquid valve temperature sensor is open or short-circuited.

Comfort Aire AC error code B7 (hardware malfunction)

This error occurs when the gas valve temperature sensor is open or short-circuited.

Comfort Aire AC error code U1 (hardware malfunction)

The error U1 is caused due to malfunction of the phase current detection circuit for the compressor.

Comfort Aire AC error code U5 (hardware problem)

The error code U5 appears due to a malfunction of the complete unit’s current detection.

Comfort Aire AC error code L3 (hardware problem)

The error code L3 is displayed when there is a malfunction protection of the outdoor fan 1.

Comfort Aire AC error code LP (hardware malfunction)

When the outdoor and indoor units do not match, it leads to the error code LP being displayed.