Analysis and repair: After checking the entire unit for no leakage, this kind of fault is generally due to poor performance of the four-way valve. Unplug the power cord of the four-way valve and connect the 220V power supply directly to the four-way valve to ensure the reversing slider inside the four-way valve moves freely. Then, start the compressor at the same time. At this point, warm air will be generated by the indoor unit. When the four-way valve is powered off, cold air will be generated by the indoor unit. Stop the machine, reconnect the plug of the four-way valve, and restart the machine to restore normal operation.
Tip: The reason for this fault is that due to a long period of non-use of the air conditioner, the reversing slider inside the four-way valve gets stuck in the middle position, causing gas crossover. This results in the fault where the air conditioner cannot either heat or cool.
Edited and organized by Beijing Changhong Air Conditioner Repair Center.
Changhong air conditioner works normally but does not cool or heat.