Is there more to this story? Did you just install them? It seems
odd that three openers would all spontaneously have the exact same
symptom. One thing that sometimes happens around here (NY) when it
gets really cold, the frozen ground rises a bit and causes the type
of symptom you're talking about. On my Sears/Chamberlain openers,
there are screw adjuster things on the side of the unit for the upper
and lower limits. I assume yours has something similar. Hopefully
that manual will answer it all for you.
-Steve Trovato
strovato@optonline.net
At 08:17 PM 1/3/2008, Steve Hammatt, Mount Vernon WA USA wrote:
>I have 3 openers. They're 1/3hp Lift Master units with chain drive.
>I'm not sure how to adjust them. They don't stop at the bottom,
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