I have a Sears Garage Door Opener that was purchased in about 1993. It is a Craftsman Model 139.53625SR (1/2 HP). The door itself is not in a bind or sticking, but the opener reverses near the end of its travel on the way down on an irregular basis, usually when it’s humid. I have adjusted the down Force s***w to the extreme limit to allow the door to close. Does this mean the primary circuit board is bad? Given the cost and the opener’s age, am I better off buying another opener? Again the door is easy to open / close by hand, with no evidence of sticking. There is no light detection device at the base of this door.
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