Navien tankless maintenance & AC maintenance Tankless was in great condition and working well. Adjusted water temperature from 120f to 125f at customers request. Recommend service on this nit every couple of years. Found no concerns with the tankless unit. AC was low on refrigerant. Added 2lb of 410-a and sealant kit. Discussed sealant kit is not a guaranteed fix for the leak but they can be effective. System is 13 years old and getting near the end of its life but this should hopefully buy a few more years out of it. After adding refrigerant, AC was cooling very well with 20f temp drop. Found no other problems or concerns with AC Signed customer up for comfort club on furnace and AC, office will call to book furnace maintenance closer to heating season.