2023 model Trane AHU 3 indoor coil frozen. No filter installed. No filter slot in AHU. Returns are fire dampers that cannot accept filter. Need to cut filter slot for AHU3. Tech allowed system to thaw while diagnosing other unit. 2017 model Goodman AHU 6 dripping into aux pan and draining from aux drain line. Kenny got pic July 19. 2023 model Carrier AHU 3 no filter installed. Installed 20*25 filter inside AHU. Trane 2010 model AHU 4 appears no longer on site. Carrier AHU installed 12 days ago. Tech found thermostat blank due to black line voltage wire not seated into polarized plug. Transformer only getting 120v. Seated plug. Programmed Vision Pro from factory startup. Allowed system to cool for 10 minutes without issue. Recorded pressures. Tested drain. Tested heat mode and defrost cycle. Returned to system 3 after getting system 4 cooling and ensured indoor coil is thawed out. Tech found true suction service port valve core leaking below switchover valve. Uploaded picture. Tighte