Very, very helpful suggestions. In checking, I find the door *does*
open if I help it along. I'll have to figure out- wish I had the
manual- how to adjust the up/down force. I see knobs which relate to
this, but it's not quite clear how to operate them.
First, though, better clean up the track and lube the roller bearings.
May even need to replace some of them.
I suspect the springs are also in play here. I believe the door, when
opening/closing it manually, should remain static at any point you stop
it. But this door will not stay open half-way, for example. Rather it
would insist on closing itself. But maybe the springs just need
adjusting, and not replacing (by the way, they are, best I can tell,
the same size).
I will definitely be asking a pro to play with the torsion spring. If
you are one, and you happen to be in Vancouver, BC, then I like to ask
for your assistance.
Thankya very much.
p.s. on double-checking, I should admit I *can* open the door with one
hand, and it's not quite as heavy as I said before. But the door won't
hold itself halfway open...it insists on closing. From your website, I
see this is the symptom on springs that need adjusting.