The Genie 33950S.S Down Limit Switch is a genuine replacement switch for select Genie residential garage door openers that use separate up and down travel switches. Identified by its brown lead and engineered to signal the opener when the door reaches the fully closed position, this component helps restore accurate travel limits and reliable door operation. The assembly features a 138-inch lead to reach from the opener head to the factory switch location on compatible rail or chassis configurations, following Genie’s color coding where brown denotes the down function.
Use this part when the door will not stop correctly at the floor, overruns the closed position, or when diagnostics indicate a failed down travel switch. Installation typically involves disconnecting power, swapping the existing down switch in the original mount, routing the harness, and connecting it to the control board as designated for the down limit input; after replacement, travel and force may need to be recalibrated per the opener’s manual. Compatible with Genie openers that specify part number 33950S.S (often paired with the red up switch sold separately), this switch supports standard residential applications. Always verify fit by checking your model’s parts list or service documentation and follow safety procedures, including unplugging the unit and maintaining functional photo-eye sensors.