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The cabin blower fan blows the cabin air over the heater core, and voilà—you’ve got warm air One of the most essential features of your car is the air conditioning system, designed to keep you cool and comfortable during those sweltering summer. When your heat only works while driving, it means something isn’t working efficiently at idle—either the coolant isn’t circulating properly, or the system isn’t maintaining enough heat or pressure

Potential causes of the problem 1. Troubleshooting solutions the scorching heat of the summer sun can be unbearable, especially when you’re stuck in traffic or driving on a long road trip The coolant moves faster, the heater core gets hot, and warm air blows inside

This is why heat only works well when you are driving

The car’s thermostat plays a key role here too It controls the flow of coolant When the engine is cold, the thermostat stays closed to help the engine warm up quickly. If the car's air conditioner is blowing warm air, there’s likely a problem that needs your attention

Here's what to look for and how to get it fixed quick. If your car is blowing hot air from the vents when the heater is off, it could be due to a faulty ac system or electrical issue This common problem can be caused by a blown fuse, faulty wiring, or other electrical problems It’s important to address this issue promptly to ensure comfort and safety while driving.

A car’s heating system is designed to keep you comfortable in cold weather, so when it’s not working properly, something is likely amiss.

Why is my car ac only blowing hot air

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