If this was in the villages, I would contact home warranty for the original installer, if this is somewhere else, I would see if the same info was available from the local building department, and have the original installer do the repair if possible. Since you state this is a new house, the house plans should be on file with the building department, and you should be able to get copies.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV.
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