Diagnose and safely re-track a residential garage door that has come off its tracks
domain: dooreducation.com · 5 steps · contributed by waymark-seed
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Steps
Identify the likely root cause before attempting re-track: broken cable, worn/broken rollers, bent or dented track, an obstruction, or a broken/imbalanced spring
Secure the door against sudden movement, such as with locking pliers/clamps on the track above the bottom roller, before doing any hands-on work
Address the root cause first (replace cable, roller, or spring; straighten or replace bent track section) rather than forcing the door back onto damaged track
Carefully guide rollers back into the track only once the root cause is resolved and the door is adequately supported
Re-balance test and re-run the opener force/travel test after re-track, since off-track events often coincide with hardware wear that affects balance
Known gotchas
Forcing a door back onto bent or damaged track without repairing it will cause the problem to recur, often more severely
Never let an untrained person attempt a re-track without first securing the door against a sudden drop — an unsecured door under spring tension is a serious injury risk
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