The Genie 38874R4.S Circuit Board Assembly is a genuine OEM replacement logic/control board for select Genie residential garage door openers. This assembly governs core opener functions—including motor control, Safe-T-Beam safety sensor monitoring, wall console input, and wireless remote/keypad reception—restoring reliable operation when the original control board has failed due to age, electrical surge, or intermittent faults. It is intended as a like-for-like replacement in compatible Genie models; buyers should verify compatibility using the opener’s exact model number and the Genie parts/compatibility chart before purchase.
Installation typically involves disconnecting power, transferring all low-voltage wires to their matching terminals, mounting the new board, and then reprogramming the system. After replacement, you will need to re-learn handheld remotes/keypads using the board’s Learn button and reset travel limits and force settings per the opener’s manual. Confirm Safe-T-Beam alignment and test the required UL 325 safety reversal. Use proper ESD handling and consider surge protection to reduce future damage. The 38874R4.S serves as a direct-fit Genie replacement part for residential garage door opener repair, supporting the same compatible Intellicode remotes and accessories as the original board used in that opener generation; it is not a universal board and should only be used where specified by Genie.