El Camino Central Forum banner


  1. 77 Classic defroster

    Heating & Air Conditioning Systems
    I have a 77 Classic trim (305 engine) in which the heater blower works and I can get air flow out the heater and vent, but when I switch it over to defrost, the flow remains at the heater. Should I be looking for a vacuum issue, or mechanical interference (something blocking the movement...