I had a problem with ours being hard to open or close, squealing, and moving like on cobblestones. We contacted a company that replaced the fixed panel, but they couldn’t come out for several weeks. They referred us to Romac and they replaced the rollers on the door, solving all the problems. You might try contacting Warranty to see who did your sliders and if they can evaluate your problem.
Hope this helps.
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"the difference between genius and stupidity is that genius has its limits."
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