Vacuum Control Motors

VACUUM CONTROL MOTORS
The vacuum control motors direct system airflow to the different outlets. There are two types of vacuum control motors used in the system:






1. The single-diaphragm for air inlet and windshield defroster door operation. Single-diaphragm motors have two positions:
a. Shaft extended with no vacuum applied.
b. Shaft retracted with vacuum applied.






2. The double-diaphragm for air damper door operation. Double-diaphragm motors have three positions:
a. Shaft extended with no vacuum applied to either port.
b. Shaft halfway extended with vacuum applied to only one port.
c. Shaft fully retracted with vacuum applied to both ports.