For all Liftmaster, Sears Craftsman, and Chamberlain brand garage door openers that use quick connect style wire connections on the circuit board.
Wiring Instructions:
Attach MOV (Metal Oxide Varistor) wires directly to motor unit terminals 2 & 3 (white & black) located on the receiver logic board.
Note: Units with quick connect terminals, both bell wires must be twisted or connected together and reinserted using only one hole leaving the second hole for MOV wire.
Route green ground wire to the chassis top. Attach wire to chassis with the self threading screw, using the existing hold as illustrated.
Note: Screw drive units with side access door, attach to the chassis hanging brackets with hardware provided.
Note: This product will not protect receiver logic board or safety sensors from nearby electric storms or lightning strikes, but from power surges caused by those elements.
Liftmaster Help, Troubleshooting, and Instructions
Call 1-800-482-2321
View Cart