I will be diplomatic and say that everyone is right. The water leaks start the rust, the springs continue to dissolve, then... you can't open the doors. I can see there being various levels of severity with this problem. There probably is no one solution as each condition needs to be diagnosed.
The real solution is to give experience to those that are new to the problem and decide the best way to resolve. We have all had similar yet different problems with our doors. Let'* take it one step at a time and not assume that one fix is it.
That'* ugly alright, but I think mdevour found something similar and came up with another solotion.