American Dryer Corp. ML-310 - Manual (Page 54)

50
5. Sail Switches (for Gas Dryers Only)
The sail switches are located in the front and back of the burner boxes. A sail switch consists of a round
damper plate on a lever arm, which is in contact with an electric switch. When the air blower comes on, it
draws air through the gas burners. This creates a negative pressure inside the burner boxes. This negative
pressure pulls in the sail switches. If the sail switches DO NOT pull in, this will prevent the dryer from
operating and a sail switch fault will display.
NOTE: An overly long or blocked exhaust duct, lack of make-up air, or clogged lint screen will
prevent the sail switches from pulling in.