Craftsman Garage Door Opener Phantom Opening
We have a Craftsman Door Opener Model #139 53975SRT1 1/2 HP which will randomly open. We will come home and the door is open. This only happens once or twice a week or there are times it will go a month without opening. It opens often enough that we don't trust it. We do not have a manual for this opener as it was with the house when we purchased it several months ago. Tried to find a manual on line but no luck. Any ideas? Any way to reprogram the codes on the unit? We do have a keypad located outside the garage door.