On Dec 4, 11:53*pm, (horton)
wrote:
Now that the weather has dropped to the low 30's, my garage door opens up
erratically. *When it opens, it stops 1/4 of the way; then I reopen it
again and opens up 1/2 of the way, and so on. *There's no problem closing
it, just the opening part. *It doesn't do this during hot weather. *I've
lubed all the necessary parts, to no avail.

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This question comes up every year around this time, so you are not
alone.

What works for me is a slight increase in the up/down force of the
opener. Since my forces are still comfortably in the middle of the
range, and I can still stop the door myself, I feel safe increasing
the force just enough to compensate for the cold weather. Come spring,
I adjust them back down, just to be extra safe.

Unasked-for Tip:

Hang your opener from some rubber straps or conveyor belt material
instead of connecting it directly to your joists/rafters. The noise
reduction from the elimination of vibration is quite significant,
especially if there is a room above the garage.