So you've patched up and caulked a hole in your wall? Maybe you've fixed the hinges on a broken door? Have you adjusted your own water heater lately?
As useful and sometimes fun as being a handy do-it-yourself fixer-upper can be, sometimes it can be dangerous. Especially in the realm of the garage door- one of the largest, heaviest moving pieces in your entire home, with hundreds of pounds of force behind it.
If you've realized you have a broken or breaking garage door spring and you think you can just weld it back together or replace it yourself, think again.
You'll want to call in professional garage door services for that one.
First of all, welding a spring back into shape is just a bad idea- the amount of wear and tear will not diminish, and the fact that it broke once means it's very, very likely that it will break again, possibly doing you or your property great damage. And replacing a garage door spring is no picnic, either- it requires a constant, sizable force to be applied to the spring while you work on it, lest it release from its track and strike you in the face with all the force of a speeding car.
Don't improve with garage door repair- call in a professional to get help unless you yourself are a professional!