My garage door would go down and then back up. I checked all possible external issues before taking the opener apart. It turned out to be a broken limit switch wire.
Same issue as here. The grey wire was broken.
https://www.diyforums.net/fixed-my-s.....-130503.html
Thought I'd post this in case anyone else has the same issue with the door going back up and has not checked this component.
I am pretty sure the wire is 20-22 gauge. Was just gonna reconnect the wire with butt connectors here.
http://www.canadiantire.ca/en/pdp/ce...6916p.html#srp
Unless someone has a better suggestion with reconnecting the wire?
Thanks