I had a Series 7 installed on 2015. Around 3 years ago, I noticed water marks in the kitchen ceiling in late fall/early winter. It looked dry, but I cut hole in the ceiling to look around and it did look dry. Noticed the HVAC duct work in this bay, closed it up, patched and repainted the ceiling. Within a year, we noticed water spots all ever the ceiling and initially suspect it might have been a leak from the upstairs bath, but found nothing definitive after a bath remodel this past year. It occurred again a few weeks ago and again last week and so I finally opened up the ceiling and found the culprit. i.e. the supply duct to an upstairs bedroom is dropping condensation all on the ceiling the length of 20' run. We had high heat (95 f) and humidity last week over several days. I never head this problem prior to the geo system installation. I pulled up the Symphony system and I see supply air as low as 38 f and so I'm thinking this is way too cold and the possible source of the problem. Looking for input.