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Low coolant and a clogged heater core are possibilities.

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11y ago
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Q: Why is your car heater blowing out cold air when it is on?
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My car is blowing out cold air not hot when the heater is on.?

You need to change your thermostat in the car.


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I assume your car heater is blowing cold air, when the heater is on. It seems that, you have air on your coolant. that air pockets blocks the cooland to travel through your heater. it may be a sign of a bigger problem such as blown head gasket in the old cars, such acura legend


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