My dodge 1500 pickup only the defrost works on the temprature control
Wednesday, October 31st, 2012 AT 2:46 AM
If you mean the air only blows from the defroster vents, check the vacuum hose going from the intake manifold to the firewall. When the vacuum is missing, the mode doors are spring-loaded to go to the defrost position for safety. Your feet might freeze but the windshield will be clear.