This replacement circuit board, part number 41AC050-1M, fits several LiftMaster Chamberlain garage door openers and is identical to earlier circuit boards with the 41AC050-1 part number. The final letter designates a model year change, so as long as the rest of the part numbers are the same, the circuit boards are interchangeable.
A bad circuit board is a common cause of problems with garage door openers, and replacing a faulty board with a new one from North Shore Commercial Door is a quicker and less expensive fix that replacing the entire unit.
This replacement circuit board fits the following LiftMaster Chamberlain models:
North Shore Commercial Door is a family-owned company with more than 35 years of experience providing garage door openers and parts for residential and commercial use. We have the expertise to help you find the parts you need. You can search by part number, using our search form, or consult our Chamberlain LiftMaster Garage Door Opener Circuit Board Compatibility Chart for a list of replacement parts compatible with your model of garage door opener. Another option is to post your questions using our Comments/Questions section. You’ll and get advice and answers from our experienced staff and from our customers, many of whom are professional installers.
North Shore Commercial Door recommends protecting your new replacement circuit board from damage caused by electrical surges by simultaneously installing a LiftMaster 990LM Garage Door Opener Surge Protector. We make it easy by offering a special combo price when you order both the replacement circuit board and the surge protector together.
The 41AC050-1M replaces the old part number 41AC050-4M
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QUESTION: what does the m stand for on the end of the part number ? Mine does not have it. by mickey z 8/18/2016
STAFF ANSWER: Just an updated part number by Taylor M a
REPLY: Here's what mine is doing. Flashing 5 times which means logic board according to the manual. I have replaced the RPM reg. And put new photo eyes on. Only thing left is the logic board. What do you think ? by mickey z r
QUESTION: My garage door suddenly stopped working. On pressing it oonly the light blinks at the motor. It opened when I pulled inside the garage and then didn't close. Safety sensors are clear of obstruction. Any suggestions? by None N 7/28/2016
ANSWER: I looked up my model garage door opener on the Chamberlain lift master website. Basically you had to count the number of times the light flashes on the unit when you engage the remote and the site recommends a solution. Your issue sounds the same as mine and I had to replace the unit's control board. <br />I hope this helps. by Mike G a
ANSWER: Unfortunately it happens to me too, and I have no idea how to remedy it. I checked all possibilities: sensors, connections, and even I replaced the board, and it still does it mostly during cold temperatures... by TOMASZ P a
QUESTION: Is this the same board used in Raynor Corporal garage door openers. Also, house took lighting strike and now no power to opener, would this board be the power supply for the operator? Thanks by James P 6/20/2016
STAFF ANSWER: What is the model number on your current board? by Taylor M a
QUESTION: Is the AC 0501M a rolling code opener? by None N 4/18/2016
ANSWER: YES, I BELEIVE IT IS. HAS PERFORMED WELLJ FOR ME JD by JAMES D a
ANSWER: Yes, the AC0501M is a rolling code opener. It is Security+ rated. Most all openers built after 1993 are rolling code openers. The latest are Security+2.0 that also allow opperation from your smart phone. by Richard D a