Could be out of sync. if it is still opening and closing and making a noise. When you retract and extend, hold the button for 4 or 5 sec's and see if this will reset the sync. and smooth it out. You should do this each time you extend and retract the slide per the mfg. instruction which keeps the racks in sync.
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Former owner of 2015 Thor Vegas 24.1 in Ocala
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