Hello,my garage door spring is broken I got sectional garage door and the spring is on the top.can I fix it myself and how thank you

There are places that you can get the parts
(lowes-HomeDepot) They also have books on fixing and installing garage doors.

If you never donit please call a professional like mrz garage doors,630-988-1049

Is there 2 springs? One on each side. If so, it would be wise to change both springs. This will keep the door better balanced. Install springs with door in up/open position.

Older spring will stretched out a bit from use.

Be sure to run a cable through spring as a safety feature to keep spring from falling if it breaks in the future. Hook cable to spring mount at back of door and to door track frame at front.

Good luck

Chuck