"Fleemo" wrote in message
...
I recently posted here about troubles with my garage door. I got some
great advice, and found the issue to be a disconnected wire. However,
a few weeks later and I have a new issue. The door, a metal rolling
door, goes down nearly all the way, but then stops about a foot from
the ground and then reverses. Not every time, but frequently. I came
out the other morning to find I'd left the garage wide open all
night. 
When I had my issues a few weeks ago, I took the time to plumb the
tracks as much as possible and lubricate most of the joints and
rollers with a silicone lubricant, so I'm surprised to hear a high-
pitched squeak as the door goes down. Is a silicone-based lubricant
not a good garage door lubricant? Are there other possible scenarios
for why the door is reversing when it's almost closed?
Thanks.
use a lithium based lubricant. it could be binding that tricks the sensor
that is used to detect obstacles.