Is the door too close to the jamb so it strikes the jamb when you try to
open it The top and bottom adjusts to control this jamb clearance.

"Jo Ann" wrote in message
...
Hello all,

I am a newbie to the group, relatively new homeowner of a relatively
old home (late 1800s). I'm not an especially skilled DIY'er, but not
a complete idiot, either. Needless to say, with an old house to
maintain, I learn more every day!

My current issue is a bifold single door that will only open about
halfway. It's not off the track and doesn't visually appear to have
anything wrong, but when I try to fold it open more than about
halfway, it resists and feels sort of "sprung." I can force it back
all the way by pushing on it really hard, but it won't stay. It
doesn't drag or stick, opens smoothly to about halfway. It happened
suddenly -- opened it once and it worked fine, opened it the next time
and it wouldn't open all the way. It feels as if there is something
caught behind it keeping it from opening all the way, but there's
nothing there. It's the kind that hangs from a plastic/nylon roller
in the top track and pivots on the lower corner (no track on the
bottom). I've had a lot of bifold doors before and thought I knew
every way they could go wrong, but this is a new one on me. Any
ideas?

Thanks in advance,
Jo Ann