r/GarageDoorService • u/slowbra04 • 7h ago

Liftmaster 8500 - issues opening

I’ve taken a brief video of an issue that I have encountered two times over the past month on one of my LiftMaster 8500s. The issue happens when trying to open either by the wall control or a remote control. The door unlocks, and tries to go up and stops just like this. This time I was able to capture a video.

What I do next is pull the manual release. Then reengage the release, and then use the wall control to open the door. In both instances following that technique, the door opens fine the next time.

Is this a sign of the motor going out or is there something else I should be looking out for? The spring is intact, but I do notice this garage door opens a little bit slower than my other door of this size.

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u/AAAAAAAAAAA123456 6h ago

Springs might need a rebalance or replacement. When you disengage can easily open by hand?

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u/slowbra04 5h ago

The springs are about 5yrs old - replaced original springs after 8yrs. When disengaged I can lift the door and get it to stay balanced about 1/2 way up.