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What causes cold air to come out of air vents when heater not on?
Wiki User
∙ 13y ago
The heater may not be on - but the fan still blows air through the vents when they're open !
Wiki User
∙ 13y ago
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Why do you get hot air at floor and defroster vents but only cold air at the dash vents vents in a 1995 chevyvan 20?
the middle vents only supply air from the ac unit using a separate in dash fan. the floor and defrost vents come only from the heater
Why does no air come out of the vents?
heater fan broken.
What causes steam to come out of air vents in 1999 expediton?
This is caused by a faulty heater core that has corroded and now has a leak. It needs to be replaced.
What causes steam to come out of vents and water in driverside floorboard?
Heating hoses are exposed and need to be replaced. The heater core is leaking coolant.
On your 1996 240 Nissan heat will not come through all vents inside?
The heater blower may not be working properly. Without the heater blower working, the air will not come through the vents.
What would cause heat not to come out of vents when set to floor and vents?
There are heater doors on the heat blower box that direct the path of the heat. Apparently the heater door to the floor vents is stuck closed.
Why does smoke come through the vents of your car when running the heater on a Grand Am 1994?
Means that your heater core is leaking coolant. Has to be replaced.
On Kia Sedona what is the HTH RR switch for?
It is for the rear heater. Press the button and this will enable heat to come out rear heater vents.
Why does steam and mist come through your vehicle vents?
You need to check and/or replace the heater core
Why would smoke come out of AC vents?
If that smoke is more like steam, you have a leaky heater core.
Why does cold air come from the heater?
possible clogged or damaged heater core
What would cause a burning rubber smell to come from the vents of your 91 Chevy Cavalier?
Bad heater core.
