Storm Door Out of Alignment

We had a pella full-view storm door installed 2 years ago and for the last several months it seems to be out of alignment. The rubber strip on the bottom is rubbing the cement step and is starting to fall off, and in order for the door to close all the way it needs to be pulled shut. On the upper right corner (opposite of the hinges) there seems to be a gap with light peeking through. In order to lock it you have to pull up on the handle, essentially lifting the door and then pull it shut (this has also caused the handle to become loose). The Pella website says to call a technician with such problems but I was wondering if anyone here had any suggestions.
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Jeffy3 wrote:

Sounds like you need to be looking at the hinge side of things for the cause of this. Either mounting screws may have come loose, or frame that they are mounted to. Unless door or hinges have become distorted, possibly through abuse.
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Sev wrote:

...
Or, alternatively, you've had movement/settling of the house itself--does the inner door show signs of not fitting slightly as well, perchance?
If not and the door itself hasn't gone out of square (which you can easily check by measuring diagonally from corner to corner--if it's off by more than 1/16" that will definitely be more than a new door. If that's the case whether there's a fix will depend on how the door was actually constructed and why it's out of square. If, otoh, the door itself is still square (actually pretty likely) and the opening itself hasn't sagged to become out of square (same check works there, of course) then the mounting or other things like lower hinge wearing out and letting it droop/sag as noted above are likely culprits.
A good check is to also look at the door from the outside as somebody else does the "pick it up" manuever to see what actually moves relative to what...
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dpb wrote:

Thanks for the detailed response, but not sure what you meant by:
"If not and the door itself hasn't gone out of square (which you can easily check by measuring diagonally from corner to corner--if it's off
by more than 1/16" that will definitely be more than a new door."
If I measure diagonally from corner to corner and the difference between the two is 1/6" or more, than it's out of square? Is that what you mean? And what do you mean by "that will definitely be more than a new door" ?
Thanks in advance!
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