Typically, this is one of two problems:
1. There's a safety device on most openers that will automatically reverse the direction of the door if it encounters too much resistance. This could be set to be too sensitive.
2. The closed-door limit is set too low.
Issue #2 can cause #1 to engage, and is much more common. Set it higher, so the door is closing with about an inch of clearance, then move it down until you get one part of the door to touch the floor. (note that it's common for one part of the door to touch the floor, and others to be a tad higher).
__________________
"My days of not respecting you are certainly coming to a middle." -Malcolm Reynolds
"It doesn't mean that if we lose a game or when we lose a game people won't then jump on and say the quest is over. Because they will. But they've missed the point." -Bronco Mendenhall on "The Quest"
|