I have a garador garage door (20 years old) one of the springs has broken and I have purchased a set of pre loaded springs, before I fit this how can I safely release the tension from the unbroken spring in order to retrieve the cable, instructions from the internet suggest just snip this one however I want to save it without doing this. It is attached at the lower end on to an elongated C clip with a groove where the cable end should be able to slip out...IF I can control the tension.
Any help appreciated. thanks
It is an up and over door with the springs located in a metal box horizontal above the door fixed to the door frame.