Chamberlain Liftmaster Professional Formula 1 Manual
This replacement circuit board, part number 41AB050-2M, fits LiftMaster Chamberlain ½-horsepower belt-drive garage door openers manufactured in 2006 and later. If your garage door opener isn’t working properly because of a bad circuit board, replacing the circuit board is a relatively simple repair that’s more economical than replacing the entire unit, and North Shore Commercial Door can help you get the right part.
The 41AB050-2M circuit board is also identical to the 41AB050-2 circuit board. The final letter designates a model year change, so the two circuit boards are interchangeable. This replacement circuit board fits the following LiftMaster Chamberlain models:. 3280. 3280C. 3280-267 North Shore Commercial Door is a family-owned company with more than 35 years in the business, so we have the experience to help you find the garage door parts you need.
We offer three options for finding the right circuit board. First, you can enter your part number in the search form to find compatible units. Second, check our for a list of replacement parts compatible with your garage door opener. And third, post your questions using our Comments/Questions section and get advice and answers from our expert staff and from our customers, many of whom are professional installers. One way to protect your new replacement circuit board from damage caused by electrical surges is to use a LiftMaster. North Shore Commercial Door makes it simple by offering a special combo price when you order both the surge protector and the circuit board in the same order.

Chamberlain Liftmaster Professional Formula 1 Manual
ANSWER: I suspect it is the receiver sensitivity of the control board. I have had two boards go bad on me.It is easier and cheaper to replace the board than to put in a new system.

Chamberlain Liftmaster Formula 1 Probl…
Each time the board went bad it would stop working at any distance but would work if I pulled up right next to the garage door. The keypad is right next to the garage door.
I also found that the new board took a few days before it started to open the door at any distance. For months now it opens the garage door from over a half block away from my house. It appears the is a weak part on the control board.