I bought a Craftsman 139.53918D with the battery backup feature to use on the house and when i got it i tested it and found out the board was bad, i bought one and replaced it and it was working good, come today when i put it up on the door and set everything once more cause of a new board and it ignores the down limit setting, it worked at times where it would shut but now it absolutely seems to ignore it and it hits the safety feature and go right back up. I have set the limits multiple times and the force and it doesn't help any and also times it refuses to learn its up and down limits, what could be the issue? What else would i need to replace?