Haier · Air Conditioners
The 4-way valve, which controls the direction of refrigerant flow for switching between heating and cooling modes, is malfunctioning.
Click steps to track your progress.
Turn off the air conditioner at the main power switch or circuit breaker.
Wait for at least 30 seconds, then turn the power back on.
Try switching between heating and cooling modes to see if the valve responds.
If the error persists, contact a qualified technician for inspection of the 4-way valve.