My door will not close, from open it travels a short distance downward and then reverse to full open, what is the problem?
Problem is most likely photo safety sensor related. Use constant pressure on the push button or up/down button on a wireless wall station; if the door closes all the way with constant pressure on the switch it is a safety sensor issue. Verify alignment of sensors, clean apertures with a slightly damp cloth or paper towel, verify connections at motor head and ensure no staple has broken or pierced a wire. If none of these correct the issue, replace the safety sensors.
