- One common cause of an air conditioning system blowing hot air is a low refrigerant level.
Refrigerant is the fluid that circulates through the air conditioning system and absorbs heat from the air inside the car.
- If the refrigerant level is too low, the system will not be able to absorb enough heat and the air coming out of the vents will be warm.
2. Faulty Compressor
- Another possible cause of hot air blowing from the AC is a faulty compressor.
- The compressor is the heart of the air conditioning system and is responsible for circulating the refrigerant.
- If the compressor is not working properly, the refrigerant will not be able to circulate and the system will not be able to cool the air.
3. Bad Blend Door Actuator
- The blend door actuator is responsible for controlling the mix of hot and cold air that comes out of the vents.
- If the blend door actuator is not working properly, it can cause the system to blow hot air even when the AC is turned on.
4. Faulty Expansion Valve
- The expansion valve is responsible for controlling the flow of refrigerant into the evaporator.
- If the expansion valve is not working properly, it can cause the refrigerant to flow into the evaporator too quickly or too slowly, which can lead to hot air coming out of the vents.
5. Dirty Condenser or Evaporator Coils
- The condenser and evaporator coils are responsible for exchanging heat with the air inside and outside of the car.
- If the coils are dirty, they will not be able to exchange heat efficiently and the air coming out of the vents will be hot.
6. Electrical Issues
- Electrical issues, such as a faulty wiring connection, can also prevent the air conditioning system from working properly and blowing hot air.
