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What could the problem be on 1988 Ford Aerostar when AC blows air out dash vents and floor but heater and defrost do not blow any air at all?

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2005-01-15 06:18:41
2005-01-15 06:18:41

A vacuum leak, or one of the doors is sticking/bad vacuum motor in the heater box.

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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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Prob the control switch. I have a similar problem with a 1993 Taurus. U put it on ac it blows out def. Def. blows out vent and none of it really blows out unless it's on high.

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Most likely a bad or disconnected vacuum hose to the defrost/floor selector in the heater ducting.

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Could this be 2 separate problems?Stuck in defrost modeNo heatSee "Related Questions" below for more about both


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