When the heater switch is left in the “ON” position, the heater will turn on and off automatically as needed. Mount Heater with 2 Screws DON’TATOUCH Heater may be HOT when the switch is “ON”! The heater is mounted below the gear reducer. Green Wires (Ground) Black Wires (110 Vac) White Wires (Neutral) For Technical Support and Ordering Parts: 1-800-528-2806 01-51148B © 2011, The Chamberlain Group, Inc. All Rights Reserved