I have a Craftsman 1/2 hp screw-drive garage door opener. It was
professionally installed in 2003 on a new garage door. Never had a
bit of trouble with it (until now).
In the middle of January, my wife said "the garage door isn't closing
all the way". Sure enough, it stopped about 3-4 inches short of
closing. And, the arm mechanism would bang into the actual drive
housing when it was fully opened.
"Ah, simple adjustment" I thought. I grabbed a screwdriver and
adjusted the travel limits (lower and upper) and it worked fine. For
about two weeks.
I noticed was, again, not closing completely and banging into the
drive housing when opened. I adjusted the limits a second time.
Looked good to me.
Three days later... I notice it's not closing all the way <grrrrr>...
The problem is happening more frequently. Obviously, my feeble
attempts at adjusting the limits work only temporarily.
Could the opening arm be consistently 'skipping' on the screw drive?
What else could cause the repeating adjustment problems? Anything I
should check before I just call someone to take a look at it?