System Operates at "Max" Heating Only

SYMPTOM DESCRIPTION:

System operates at maximum heating capacity, even if the temperature wheel is set to "MIN".

CAUSE/REMEDY:

^ FUSE 11 BLOWN.
^ CONTROL UNIT DEFECTIVE. Replace control unit.
^ NO VACUUM TO SWITCHOVER VALVES. Check heater vacuum system for leaks.
^ SWITCHOVER VALVES DAMAGED.

SYMPTOM DESCRIPTION:

System operates at maximum heating capacity, except when the temperature wheel is set to "MIN".

CAUSE/REMEDY:

^ INTERRUPTION IN THE INTERIOR OR AMBIENT TEMPERATURE SENSOR CIRCUITS, OR THE FEEDBACK POTENTIOMETER.
^ DEFECTIVE CONTROL UNIT.