The door drops or climbs when you let go halfway
Why it happens
The springs carry the weight of the door, and they wear with use rather than age. Most torsion springs are rated to around 10,000 open-and-close cycles, which is about seven to ten years for an average home. Salt and rust can shorten that.
Why it matters
A door that won't hold itself up is heavy to lift by hand and makes the opener work harder. If you live alone, there's nobody to help hold it.
Response
Thom checks spring tension and balance on every service.




