Garage door will not open fully; it stops partway and may reverse or the opener stops running.

Safety first: Do not attempt to adjust torsion springs yourself; they are under high tension and can cause serious injury. Call a professional for spring work.

• Check manual operation: Disconnect the opener using the emergency release and lift the door by hand. If it is heavy or stops partway, the springs or tracks need service.
• Inspect tracks and rollers: Look for bent tracks, loose brackets, or rollers that do not spin freely. Tighten loose hardware and replace damaged rollers.
• Adjust up travel: On the opener head, locate the UP travel adjustment. Increase the up travel slightly so the door opens fully without hitting the stop bolt or opener rail.
• Test with door connected: Re-engage the opener and run a full open cycle. Ensure the door clears the opening and does not hit the opener stop.
• Call a pro for springs: If the door is still heavy or will not stay open halfway when disconnected, have a qualified technician replace or adjust the springs.