Don't give up so fast Flee. There's a lot of dust up there that could
have shaken loose and looked like smoke as the mechanism shuttered
trying to open.
The fit of the door is surely binding with the expansion caused by the
heat of the sun. Look closely at the side rails and see if there's a
way to loosen them slightly or reposition them . There are ways to fix
it, but only after you find where it binds. Even if the width of the
opening is too small and is pinching the door, that can be handled.