If The door will not lift and you heard a loud bang from the garage.
Then Torsion spring replacement.
A snapped spring leaves a visible gap in the coil; the opener should stay off until it is replaced. Torsion Spring Replacement

Inspection, adjustment, sealing, and section-level repairs.
This is where a door comes when it is still worth keeping. Panels get straightened or swapped one at a time, tracks get trued, rollers get renewed, and the whole assembly is run by hand to confirm it moves the way it should.
Garage Door Safety InspectionThere is a new sound.
Garage Door Tune-UpSince the first cold snap the door has been sluggish.
Off-Track Garage Door ResetA delivery van backed into the shop's overhead door this afternoon.
Garage Door Panel ReplacementAfter an overnight freeze the door stuck to the slab, the opener strained, and something gave.
Garage Door Bottom Seal ReplacementWith the door closed and the lights off, a bright line of daylight runs along the floor from one side to the other.
Garage Door Perimeter WeatherstripDry leaves keep appearing in the same corner inside the garage, and this fall there were mouse droppings along the wall beside…
Garage Door Manual Lock RepairOn the old wooden door out back, one lock bar hangs loose from a rusted guide and the other is bent at an angle, so the handle…Tap a situation. The answer opens here.
If The door will not lift and you heard a loud bang from the garage.
Then Torsion spring replacement.
A snapped spring leaves a visible gap in the coil; the opener should stay off until it is replaced. Torsion Spring Replacement
If The door rises a few centimetres, stops and settles back down.
Then Spring and opener force check.
Often the spring has lost tension and the opener is protecting itself; balancing the door usually resolves it. Torsion Spring Replacement
If The opener runs and the chain moves but the door stays put.
Then Trolley and drive gear repair.
The trolley may be disconnected or the drive gear worn; both are common, repairable faults.
On-site assessment preferred · (365) 605-5927, open 24/7