What Causes a Car's Air Conditioning to Have No Warm Air?
2 Answers
The reasons why a car's air conditioning has no warm air are as follows: 1. The engine thermostat fails; 2. The hot water valve or its vacuum actuator fails; 3. The heater inlet or outlet pipes are blocked, or the heater core is clogged with deposits; 4. The temperature control damper or its control cable is damaged; 5. The air conditioning blower is damaged or its control circuit malfunctions; 6. The air conditioning air distribution ducts are blocked or leaking. More related information is as follows: Car air conditioning refers to the air conditioning device installed in a car, 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.
My car's heater stopped working last month. After checking around, I found the coolant reservoir was almost empty, possibly due to a leak or long neglect. I tried adding coolant myself, but the issue persisted. Taking it to the repair shop revealed a clogged heater core, which cost a few hundred bucks to fix. Driving without heat in winter is brutal – windows fog up obscuring the road, and it's easy to catch a cold. I recommend regularly checking coolant levels, especially during seasonal changes. If adding fluid doesn't help, it's likely a core or thermostat valve issue – address it early to prevent engine overheating. During maintenance, have technicians test the entire system to avoid hassles. Don't repeat my mistake of delaying until it affects work.
