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Why is there hot air coming out when the car's air conditioning is not turned on?

1 Answers

JeremiahLynn

07/29/25 11:18pm

The reason for the hot air is that the vehicle is in the external circulation mode. When the car's air conditioning system is set to external circulation, outside air enters the cabin with the airflow during driving, creating natural ventilation. Below are some common issues with car air conditioning: 1. The air conditioning is set to heating but the warm air is not hot: If the engine coolant temperature is normal (low engine coolant temperature will definitely result in no warm air), this could be due to issues like coolant circulation failure, damaged water pump impeller, or clogged air filter. 2. Different temperatures on both sides of the air conditioning: This might be caused by incorrect settings in the dual-zone air conditioning. 3. Warm air with a burnt smell: Possible causes include aging air conditioning wiring, excessively high air conditioning temperature settings, or blocked air vents.

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