Why is the car air conditioning not heating?

1 Answers
CalvinMarie
07/30/25 8:55am
Here are the reasons why the car air conditioning is not heating: 1. The vehicle has just started, and the engine temperature has not yet risen. It will heat up after warming up the car. 2. Insufficient coolant. Lack of coolant can also cause the car air conditioning not to heat. Adding coolant will solve the issue. 3. Damaged water pump. A faulty water pump can disrupt the coolant circulation system, leading to the car air conditioning not heating. Replacing the water pump will fix the problem. 4. Clogged heater core. A blocked heater core prevents the hot water from the engine from circulating into the core, resulting in the air conditioning not heating. Cleaning the heater core will resolve this. 5. Faulty radiator fan. If the radiator fan runs continuously, it can prevent the coolant in the radiator from heating up, causing the air conditioning not to heat. Inspecting and repairing the radiator fan will address this issue.
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