why my heater does not switch from front vents to defrost?
could be a disconnected vacuum line
ok will check lines.
There is a supply vacuum line that goes through the firewall next to the brake booster usually. It sometimes gets disconnected or damaged. I fixed one on a 97 with 5.9l diesel that was on the right side of the engine going through the firewall as well. It had melted on the exhaust manifold. Either way, look for a line going into the firewall.
Wil my heater keep the Windows in my car defrost without the heat coming out the defroster I have a 2000 Chrysler Concord
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