What Causes the Air Conditioner's Heating to Not Work Properly?
2 Answers
Air conditioner's heating not working properly is due to: 1. Engine cooling system malfunction; 2. Poor operation of the heating control mechanism. The method to determine where the fault lies is: Check the temperature of the two inlet pipes of the heating radiator. If both pipes are sufficiently hot, it indicates a problem with the air volume control mechanism. If both pipes are cold, or one is hot and the other is cold, it indicates a cooling system issue. Car air conditioning refers to the air conditioning device installed in the vehicle, which can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety. It generally includes refrigeration devices, heating devices, and ventilation devices. This combined system makes full use of the limited space inside the car, has a simple structure, is easy to operate, and is a popular modern car air conditioning system internationally.
The heater isn't blowing warm air, which I think is quite common. I encountered this issue myself last year. That winter, it was freezing cold in the car while driving. After troubleshooting, I found out it was due to insufficient coolant—the heat generated by the engine couldn't reach the heater core, resulting in no warm air. Another possible cause is a faulty thermostat, which controls the coolant flow. If it gets stuck in the closed position, hot coolant can't circulate, and the air won't warm up. Additionally, a clogged heater core could be the issue, where scale or air accumulates in the system, blocking the heat exchange. I later topped up the coolant and checked the fan, only to find the blower was working fine but still no warm air. Eventually, I had a technician fix it. Remember, such minor issues should be addressed promptly; otherwise, the cold cabin can affect safe driving. Regular coolant changes and HVAC system checks are good preventive measures.
