Error and fault codes help a technician diagnose issues with the portable air conditioner. If the unit is displaying an error, check the chart below for possible error code resolutions:
| Fault Code | Description/Reason | Solutions |
| E0 | Indicates incoming power issues, such as a low voltage condition or excessive power consumption. |
Unplug the unit for 10 minutes. Service may be required |
| E1 | Indicates a stuck button on the front panel key pad. |
Unplug unit and press each button firmly to reset the switches. Then, plug the unit back into the power supply. Service may be required |
| E4 | Unit has a tank built-in that must be emptied periodically. E4 indicates the tank float is stuck. | Open the water tank and verify no debris is blocking the operation of the float. |
| STOP | Unit has a tank built-in that must be emptied periodically. STOP indicates the tank must be emptied or tank float is stuck. Unit will not run while STOP appears. | Empty the tank. Open the water reservoir and verify no debris is blocking the operation of the float. |
| High Temp | Appears when ambient room temperature is over 99 degrees F. | If the ambient temperature is not above 99F, then service may be required. |
If you continue to have problems, please contact Haier Appliances at 1-877-337-3639 or visit https://www.haierappliances.com/support/schedule-service. Most portable air conditioners do not have repair parts available and may not be serviceable. If in-warranty, check your Owner's Manual for warranty information.