garage door opener problems
i moved into a house with a 2 car door garage with a craftsman 139.53629SRT 1/2 HP. i am guessing this unit is at least 7-8 years old. sometimes the doors would not open. i knew to check the sensors. i noticed the previous owner mickey moused the wire on one of the sensors, but i could get it to work. this lasted for months. recently, the same thing happened, but i could not get the wire to connect to the sensor. so, i bought replacement sensors at sears (they told me they were compatible-they sold me #41A4373A infared sensor kit), put them in right (i think), tried lining up the sensors, but they would not light up. is it the wire going back to the main unit? am i just not lining them up right? maybe they aren't compatible? the door does open manually. very frustrated.
the other garage door is now opening about 6 inches, then stopping and closing on its own, then opens again. one of the lights is lit up on the sensor, but the other isn't. despite being 2 separate units for the two doors, when one of them is on the fritz, the other becomes a problem too.
please help and thank you!