The 373LM is a 3-button remote control for use on commercial garage doors or gates. Step 1. Learn more today. Press CH1 or CH2 on the Radio Board inside the Control Panel and release CH1 to program remote to open both gates (or partial opening on Sliding Gate) CH2 to Program Remote to open one gate (or full opening on Sliding Gate). Programming instructions for Liftmaster and Raynor garage door opener #973LM and Raynor #973RGD three button remote controls. Step 2. LED will light. Programming instructions for Liftmaster and Raynor garage door opener #373LM and Raynor #373RGD three button remote controls. How to Program a Standard LiftMaster Remote Control. Security+ Remote Control Programming Instructions for 371LM, 373LM in English, French and Spanish How to Program HomeLink to My Chamberlain or LiftMaster Garage Door Opener How to connect a door strike or maglock to a CAPXL or CAPXLV controller Click here to purchase a #373LM remote. Press Remote control Button you wish to use. Suitable for all LiftMaster, MotorLift and Chamberlain remotes and gate opener control panels. Discover the 373LM from LiftMaster. 3-Button Remote Control Model 373LM TO ERASE ALL CODES FROM MEMORY SECURITY+® REMOTE CONTROLS MODELS 371LM AND 373LM To prevent possible SERIOUS INJURY or DEATH from a moving gate or garage door: • ALWAYS keep remote controls out of reach of children. Programming a LiftMaster remote is a walk in the park. The 371LM and 373LM remotes are compatible with Liftmaster, Chamberlain and Craftsman garage door openers with a Purple Learn Button 371LM Liftmaster Remote Shop 371LM Remote Just follow these simple steps and you will get your LiftMaster remote working with your garage door opener in no time. Click Here to purchase replacement remotes for the obsolete 973LM and 973RGD remotes. NEVER permit children to operate, or play with remote controls. Quick note: Before you begin to program your remote, make sure you have a light bulb installed in your garage door opener. PROGRAMMING THE REMOTE CONTROL For use with garage door openers, gate operators or other products that are 315 MHz Security ... LiftMaster, 373P, 371LM, 373LM, remote, transmitter.