Take a look at the attached wiring schematic. If I recall, the two wires work like this. In one position, power is fed through one wire to direct the door one way. When you switch it, the power goes through the other wire (changes polarity) causing the door to go the other way. Let me know if the schematic helps. To me, it sounds like it is either out of adjustment or the power isn't coming through the opposite wire.
Wednesday, September 28th, 2011 AT 2:50 AM