A malfunctioning garage door opener system is inconvenient, but if small children are in your home, it is also extremely dangerous. An unresponsive keypad or remote may be frustrating, but erratic or inconsistent safety sensors are much more of a problem. Fortunately, these problems are common with a faulty logic board, and replacing your garage door system’s circuit board is an economical and easy fix to restore your system back to proper functioning.
The 41A5021-4M-315 circuit board is compatible with numerous LiftMaster 315MHz systems. To ensure your system is compatible with this circuit board, please review the
Chamberlain LiftMaster Circuit Board Compatibility Chart. Simple to install, the replacement Chamberlain 41A5021-4M-315 for sale features a Learn button to also provide easy programming. For step-by-step instructions on how to install, program and adjust your new circuit board, please refer to the 41A5021-4M 315
Manual. The 315MHz replacement logic board requires photo eye sensors to operate, and after installation, it’s crucial to test your safety reversal system by following these steps.
• Place a one inch board, or 2x4, under the center of door with the door fully open.
• Close the door. The door should immediately reverse directions when the garage door hits the board.
• If the door only stops on the board, instead of reversing directions, increase the Down limit by turning the adjustment screw 1/4 counterclockwise.
As a recommended safety precaution, we suggest testing your safety reversal system at least once a month. If your safety reversal system continues to malfunction, it’s important to call a professional. We also recommend using a
990LM Garage Door Opener Surge Protector to protect your replacement 41A5021-4M-315 circuit board, as most faulty circuit boards are due to power surges.
