Question about 1996 Ford Taurus

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Heater only blows hot air if I rev up the engine to about 4000RPM

I have a 2003 Passat that wont blow hot air. It blows somewhat warm air and I found when I rev the engine up to about 3 or 4000 it almost instantly starts blowing hot air. When it gets back down to idle it's instantly cold/warm again? Is this a thermostat or something else?

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Make sure it has a thermostat

Posted on Dec 12, 2009

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