Sears Craftsman 139.53978SRT Receiver Logic Control Board Assembly for Garage Opener. Garage Door Replacement Parts.
Liftmaster and Chamberlain Compatible (41A5021-3E | 41A5021-1I).
971LM Remote Control Compatible.
976LM Keyless Entry Compatible.
Security + 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