LTD Crown Victoria V8-351 5.8L VIN G Windsor 2-bbl HP (1982)
Thermostatic Air Cleaner Vacuum Switch: Description and Operation
Cold Weather Modulator
Fig.4 - Cold Weather Modulator
This modulator, Fig. 4, located in the air cleaner housing of some 1975-82 Ford vehicles, prevents the air cleaner door from opening to non-heated
outside air at ambient temperatures below 55° F. At ambient temperatures above 55° F., the modulator is inoperative. During acceleration at
ambient temperatures below 55° F., the modulator located in-line between the bi-metal sensor and vacuum duct motor, will close off vacuum to the
motor and hold the duct open.
