SWISCO - The Replacement Hardware Authority

Upper door frame of Andersen door

A quick learner from Troy, ny says:
My andersen sliding door on the bottom has a single raised "rail" for the rollers to slot over. But the upper doesn't. It looks like the upper rollers should roll in a groove. What is the deal?
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Paul from SWISCO responded:
Andersen just has a plain u-channel at the top for the door to slip into. The roller just rides in the channel to give the door tension so it won't jump the track.
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