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If (BOTH) hoses are hot U might have a mixer door problem-A bad Actuator will do it,OR U could just have a small Vacume hose off - under the dash on the passenger side OR under the hood - Check from the Intake manifold 2 the fireeall on the passenger side.

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โˆ™ 2004-12-16 23:42:18
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Q: Why would a 99 Jeep Limited heater lines get hot but it only blows cold air?
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1989 corvette heater blows cold air even though both lines are hot going to the firewall do you have to change the heater core and if so how do you do it?

I would say that your heater core is ok...it sounds like you have a bled door promlem in the dash.


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ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?


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What would cause the heat to stop blowing in a 2004 Impala?

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