Door feels unusually heavy
Possible spring tension, cable, or balance problem.
Door lifts crooked
Possible cable, drum, roller, track, or spring issue.
Opener hums without lifting
Possible opener strain, trolley, resistance, or balance issue.
Door reverses while closing
Possible sensor, travel-limit, obstruction, or force-setting issue.
Door shakes or grinds
Possible roller, hinge, track, alignment, or opener wear.
Water or light enters below
Possible worn seal, uneven floor contact, or door alignment issue.
Panel is bent or separated
Possible sectional damage affecting travel and structural support.
Remote or keypad fails
Possible battery, programming, receiver, power, or opener issue.