LiftMaster Garage Door Opener Problems



Question:
I recently had to replace my LiftMaster 1260LM garage door opener's receiver board after an electrical surge damaged the old one. I also replaced both sensors and the wall control. While the door goes up and down fine, the wall-mounted control does not. The control has a large button for open and closing the door which works fine. However, the light button and the lock button do not work. The light button will turn the light on but not off. The lock button actually operates the door in the same manner as the large door button (!). I have double and triple checked my wiring. I substituted my old wall control and same thing happens. The only difference I can find is that my old receiver board was a 41A4252-6A and the new one is a 41A4252-6D. LiftMaster says the difference is merely an upgrade and that the problems lies in the wiring. However, I haev check and re-checked the wiring.

Answer:
LiftMaster is made by Chamberlain, who also makes Craftsman openers. If I'm not mistaken, don't they all use 2 stranded bell wires to connect to the controller? I don't see how wiring could be your problem. I realize that the problem may also lie with the wiring or connection of the board but, there again, there's isn't much to installing these things. It just seems to me that the problem is with circuitry, not wiring. Someone else here may have some better advice, but I would probably pay the $40 or so service call fee to have a tech come out and verify things for you.





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