The most common cause of this problem 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 there is not enough refrigerant in the system, it cannot absorb enough heat and the air will blow warm.
2. Compressor problem
The compressor is the heart of the air conditioning system. It compresses the refrigerant gas and sends it through the condenser. If the compressor is not working properly, it cannot compress the refrigerant and the air will blow warm.
3. Condenser problem
The condenser is a heat exchanger that releases heat from the refrigerant gas. If the condenser is clogged or damaged, it cannot release enough heat and the air will blow warm.
4. Expansion valve problem
The expansion valve controls the flow of refrigerant into the evaporator. If the expansion valve is not working properly, it can allow too much or too little refrigerant to flow into the evaporator, which will cause the air to blow warm.
5. Evaporator problem
The evaporator is a heat exchanger that absorbs heat from the air inside the car. If the evaporator is clogged or damaged, it cannot absorb enough heat and the air will blow warm.
If you are experiencing this problem, it is best to take your car to a qualified mechanic to have it diagnosed and repaired.