1, temperature controller is damaged: the temperature controller is damaged, so that the water temperature can't go up all the time, resulting in no hot air.
2. Warm water valve failure: Warm water valve failure. After the warm water valve fails, no coolant flows to the warm water tank, so there is no hot air.
3. The heater tank is blocked: the heater tank is blocked. After the warm air tank is blocked, the flow rate of coolant in the warm air tank will slow down and become smaller. Due to insufficient heating, the hot air of the air conditioner will naturally not be hot.
4. Air conditioning failure: Freon leakage, refrigerant charging, dirty or covered indoor filter, dirty cleaning filter, outdoor heat exchanger fin, cleaning outdoor heat exchanger fin, four-way valve and solenoid valve failure.
5, air conditioning aging: equipment aging, need to replace the new air conditioner.