Why is the car air conditioning not heating?
2 Answers
There are two main reasons why the car air conditioning is not heating: 1. Engine cooling system failure; 2. Poor operation of the heating control mechanism. During maintenance, it is necessary to first determine which aspect is causing the problem before performing corresponding repairs. 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 riding environment for passengers, reducing driver fatigue, and improving driving safety. Car air conditioning generally includes refrigeration devices, heating devices, and ventilation devices. This integrated system makes full use of the limited space inside the vehicle, with a simple structure and easy operation, making it an internationally popular modern car air conditioning system.
It's quite common for a car's air conditioning to not blow hot air. I've encountered this issue several times when driving myself. The most likely cause is a clogged heater core or poor circulation of the engine coolant, which prevents heat from being transferred. Sometimes, the blend door actuator in the air conditioning control panel fails, causing the hot air passage to get stuck. Of course, basic operations should also be checked. For example, if you rush to turn on the heater before the temperature gauge rises, it won't work—wait for the car to warm up for a few minutes before trying again. Additionally, if the blower motor doesn't spin fast enough or doesn't spin at all, how can you expect any air to blow out, let alone warm air? The most troublesome issues are insufficient coolant or a faulty thermostat, which prevent the engine from reaching the proper temperature, leaving the heater blowing cold air. It's recommended to first check the engine temperature and then the airflow. If that doesn't help, just take it to a repair shop to disassemble the dashboard and inspect the heater core.
