1968 Bird Heater Control Problem

[KEITH WAHL]

:banghead
AIR CONDITIONING WORKS FINE
DEFROST WORKS
MOVE LEVER TO HEAT AND TEMP TO WARM.. NO AIR FLOW THROUGH DUCTS
CHECKED HEATER CONTROL VALVE APPLIED VACUUM WITH VALVE REMOVED FROM VEHICLE IT OPENS AND CLOSES
CHECKED VALVE ON FIREWALL IT OPENS AND CLOSES

ANY THOUGHTS? SUGGESTIONS

THANKS

KEITH