What Causes the Hot Air Conditioner to Stop Blowing Air?
3 Answers
Reasons why the hot air conditioner stops blowing air: 1. Poor operation of the heating control mechanism; 2. Fault in the engine cooling system. Methods to determine the cause of insufficient car heating: Check the temperature of the two inlet pipes of the heating radiator. If both pipes are sufficiently hot, it indicates an issue with the air volume control mechanism. If both pipes are cold, or one is hot and the other is cold, it suggests a problem with the cooling system. The car air conditioning system mainly consists of components such as the compressor, condenser, evaporator, expansion valve, dryer reservoir, and pipelines. The car air conditioning system provides a comfortable environment for passengers, reduces travel fatigue, creates favorable working conditions for the driver, and serves as an essential ventilation device for ensuring safe driving.
I've driven for several years and encountered the issue of no air coming out of the AC several times. The most common cause is a dirty cabin air filter blocking the air intake, preventing airflow, especially noticeable after prolonged driving on dusty roads. The blower fan might also get stuck or have a damaged motor, resulting in no airflow at all. Sometimes electrical issues, like a blown fuse or failed relay, can cause system short circuits and unresponsiveness. When I check it myself, I start with the basics—open the glove compartment to inspect and replace the filter below. If it's clean, I listen for any abnormal sounds from the blower fan. If I can't find the issue, I take it to a repair shop where they can test it more accurately with tools. Regular maintenance, such as replacing the filter every six months, can significantly reduce the chances of failure. Heating issues are critical in winter, and safe driving should never be taken lightly.
It's really frustrating when the air conditioner stops blowing air, especially on cold days with heavy fog that obstructs visibility. From my experience, the most common issue is with the blower—either the motor is broken or there's too much dust buildup preventing it from spinning. A clogged filter is another major factor, blocking the air ducts. On the electrical side, a blown fuse or a faulty mode selection switch could be the culprit, where the setting is on heat but the fan isn't activated. The first step after parking is to check if the filter is clean, then start the car and listen for the blower sound. If you're not familiar with electrical systems, avoid tampering to prevent more severe short circuits. A professional repair shop can quickly resolve the issue, ensuring driving safety. Regular maintenance is key—avoid using the air conditioner for extended periods in dusty environments.
