Issue was noise related. Replaced Aprilaire 413 filter Set dipswitches to configure 2-stage heating with only W1 in the terminal block. So will run at first stage heating. Set heating fan speed profile to “A” lowest speed available. They are fine with the sound with these settings. 2 of the 12” Honeywell round dampers are original to the house, may be getting stuck. We recommend replacing them. Left email estimate for this, *We replaced the other 12” round 12/10/21 System operating well at this time.
