The E3 error code indicates a low refrigerant level in your Haier air conditioning unit. Low refrigerant can cause inefficient cooling and potential system failure if not addressed.
Leaks in the refrigerant lines can lead to a drop in refrigerant levels.
The system may have been undercharged with refrigerant during installation or a previous service.
Blockages in the refrigerant line can also trigger low pressure.
Inspect the refrigerant lines for visible signs of leaks.
Have a professional technician top up the refrigerant if it’s low.
Ensure that there are no blockages in the refrigerant line or other components.