Acutally it DOES matter which way round you apply power to the motor. One way will "CLOSE" the door the other way will "open" the door. If you get it the wrong way round you will know as nothing will happen. Take the power off quickly so as not to burn the motor out. swap leads and the motor will cycle through and pop the door open.
Apart from that this worked perfectly
Solved out door problem today with this.
sparkynz
April 2010