won't open with weight of door, but opens/runs when detached
Overhead Door Legacy 496cd/b model. Intermittently will open with door attached, but more often than not, we have to pull cord and push open. Then we can hit button and the chain/motor will run to "open" position. It will lock into position and reengage the door. It then closes with no problem.
I know this is fixable, just don't know what to replace/fix. I am very handy and can fix about anything.
OK Bob. When the door does open with the remote, does it open smoothly or is it hesitant?
What about when it doesn't - does it move at all?
After you disengage the door, do you feel any binding as you open the door manually?
Does it feel heavy?
Check the track - is it straight? Any bends?
What about the rollers? Are they worn or loose, do they work freely?
What about the spring? I assume it is not broken or the door would never open with the motor and would feel very heavy when opening manually. It may feel heavy if the spring is out of adjustment.
Check those then we can go from there.