heat only comes out defroster?

TwoToneThunder

Registered User
i have a 89 sc not with climate control and when i turn the fan to full blast it makes noise and no matter which button i press barely anything comes out the vents it comes out the defroster instead?
 
Try this....

If you remove the glovebox, you should find a small vacuum line running to the "vent box" under the dash. This line controls the baffle gate that directs air to the vents. It may have come loose, or it could be leaking. They get brittle with age. If the line looks to be OK inside the car, then check the VAC lines in the engine compartment up by the firewall on the passenger side. The line runs through the firewall opening by the heater hoses.
 
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