The air conditioner works normally in cooling mode but does not start in heating mode, which can be caused by a variety of reasons. Here are some common causes and their possible solutions::
The ambient temperature is too low:If the outside temperature is very low, the heating mode of the air conditioner may not be activated. Most air conditioners do not work effectively at extremely low temperatures.
Temperature setting issues:Make sure that the temperature setting of the air conditioner is higher than the current temperature in the room. If the temperature is set too low, the air conditioner may not start the heating mode.
Lack of heating agent or leakage of heating agent:Insufficient or leakage of heating agent may cause the heating function to fail. Professional technicians are required to inspect and replenish the heating agent.
Four-way valve failure:The four-way valve is a key component that controls the switching of cooling and heating modes of air conditioning. If the four-way valve fails, it may cause the heating mode to fail to start.
Control System Issues:A malfunction of the control board or remote control may cause the heating mode to fail to start. Check that the remote control is working properly, or try resetting the aircon control system.
Communication failure between internal and external machines:If there is a problem with the communication between the internal and external units, it may cause the heating mode to not work properly. Check for loose or damaged cables.
Sensor Issues:Damage or misalignment of indoor or outdoor temperature sensors can result in incorrect temperature readings, which in turn can affect the activation of heating mode.
Power issues:Check if the power supply to the air conditioner is normal. Sometimes problems with electrical outlets or circuits can cause some features to fail.
If the problem is not resolved after a basic inspection, it is recommended to contact a professional aircon maintenance personnel for inspection and repair. Attempting repairs on your own can cause even more damage, especially when it comes to refrigerants and electrical systems.