Guide :Building Materials : Craftsman LiftMaster Chamberlain Garage Door Opener Wireless...
Sears Craftsman 1/2hp Garage Door Opener
When I put power to my Door Opener the motor turns hard to OPEN, reaches a max stress point in the chain/cable and stops there, the motor continues to hum with the rail bent from the pressure. It will not release the pressure and/or return to a CLOSE cycle. Down/Up Force is set to lowest setting.