A bang, a gap or a door that suddenly feels heavy
A sudden loud noise, a visible separation in a torsion spring or a door that barely lifts can suggest spring failure. These observations do not identify the correct replacement by themselves. Other lifting-system faults can cause similar symptoms, so describe the change without ordering a spring on appearance alone.
The opener may be reacting to the door
An opener that strains or stops is not automatically a failed motor. The spring system helps counterbalance the door. Continuing to cycle an opener when that system is damaged can make the situation worse. Avoid using the operator to force the door through a heavy or uneven movement.
Keep the opening clear
Do not wind a spring, loosen its fittings or try to lift an unstable door. Leave spring and related lifting-hardware work to a qualified service professional. If the door is partly open, keep people, vehicles and pets away from it and explain its position when calling.
What a spring inquiry should include
Tell us whether the door has one or two visible springs, whether a cable is loose and whether a vehicle is trapped. A photograph from a safe position and the door label can help the discussion. Final spring selection depends on the door and its configuration, not a universal size.
Read the equipment guidance
Use the instructions for your exact equipment. The Chamberlain Group manuals and parts library and Clopay care and maintenance manuals provide manufacturer context. These links are reference material, not a claim of a dealer relationship.