Sears Craftsman 139.53671SRT3 Garage Opener Receiver Logic Board Assembly. Garage Door Replacement Parts.
Liftmaster and Chamberlain Compatible (41A5021-3D | 41A5021-1I).
971LM Remote Control Compatible.
976LM Keyless Entry Compatible.
Security + Frequency 390 MHz.
We always ensure board compatibility. You will receive a perfectly and compatible replacement board that will fit your operator.
THIS IS AN OEM LIFTMASTER PART THAT IS A REPLACEMENT PART FOR THE SEARS CRAFTSMAN GARAGE DOOR OPENERS