Upon arrival spoke with customer who’s informing me that leak was coming from around daughter’s bedroom return grill. Inspected air handler in attic kneewall. A lot of air leakage is coming from supply plenum. Sealed supply plenum with aluminum tape. Try to locate return flex in question. Was unable to do so due to attic limitations and supply and return flex being tied into ERV. Condensate drain was flush and tested. Condensate pump discharge normally. Customer is aware that attic flooring is not insulated and issue seem to be related to condensation around return grill. Customer will monitor conditions of return grill. Insulation department may need to be involved. System is operating normally @ this time no signs of leak was visible @ return grill or on ceiling below air conditioning unit. View visual findings from this job here - https://visionshare.xoi.io/?id=XA-FA02-01792B21888B4DDF8CBFED2DECEBD76F