The Genie 34538S.S Down Limit Switch is a genuine OEM replacement for Genie Chain Glide openers that use a magnetic travel-limit system. This switch detects the closed position of the door and signals the operator to stop downward travel, helping restore accurate, consistent operation when the original sensor fails or becomes misaligned. Designed for Chain Glide “magnetic” models, it works with the trolley-mounted magnet to provide reliable down-limit positioning in residential garage door applications.
Installation is straightforward: disconnect power, replace the existing down-limit switch on the opener rail, connect the factory-style plug, and adjust by sliding the switch along the rail to set the closed stop point per the opener’s manual. After installation, test door travel and safety functions, including Safe-T-Beam sensors, and recheck force settings as required. This component pairs with the corresponding up-limit switch (sold separately) on compatible Genie Chain Glide magnetic systems. It is ideal as an OEM replacement part for maintaining proper limit control on Genie chain-drive openers using magnetic limits.