Why is there no air coming out when the air conditioner is set to heat?
2 Answers
Here are the specific reasons why the air conditioner does not blow air when set to heat: 1. The heating mode takes about 5-10 minutes longer than the cooling mode to start blowing air, as it hasn't reached the preheating time yet. After turning on, the air conditioner first performs defrosting before normal heating begins. 2. The four-way valve may not be open, or the valve itself could be stuck, or the electrical control may not be supplying voltage to the four-way valve. 3. The air conditioner requires refrigerant (Freon) to operate. If the refrigerant is insufficient, the unit may fail to work or temporarily stop functioning. It is necessary to call a professional to refill the refrigerant promptly. 4. The indoor pipe temperature sensor might be damaged.
My car had an issue where the AC wouldn't blow hot air, leaving me shivering in the winter while driving. It might be due to the blower not spinning or being stuck—try turning on the AC to listen for the blower sound; if there's no noise, that's likely the problem. Check the cabin air filter, as a dirty one blocking the airflow is a common cause—you can replace it yourself. Another possibility is a blown fuse; locate the blower's corresponding fuse in the fuse box under the steering wheel and replace it if melted. A faulty mode switch can also prevent airflow, so verify the control panel settings. Aging wiring causing poor contact is another risk. I handle simple fixes myself, but for complex issues, I take it to the repair shop—don’t tinker on the road and compromise safety. Start with the filter and fuse checks—simple and hassle-free.
