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Car Heater Blowing Cold Air?

My heater blows hot air for 3 seconds then cold air, why? The blower works good and the AC works perfectly, but not my heater.

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Bronze Answer Medal for All Time! 155 Answers
December 10, 20160 found this helpful
Best Answer

Check the hose connections in the engine to the heater, from the back of the dashboard, they may be loose.

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Silver Post Medal for All Time! 255 Posts
December 27, 20160 found this helpful
Best Answer

Check the thermostat and does it have enough antifreeze/coolant?

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December 15, 20160 found this helpful

You may to replace the thermostat. Many automotive stores will scan for free. Auto zone will do this as well as advance auto.

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Gold Post Medal for All Time! 677 Posts
December 30, 20160 found this helpful

You could have a clogged heater core.

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