Performed heating maintenance on one hot water boiler removed and cleaned the burners and standing pilot assembly and replaced the thermocouple also cleaned burner tray and checked expansion tank also performed maintenance on one gas fired furnace cleaned burners and the igniter and the flame sensor and checked the air pressure switch and checked the electrical and mechanical components and blower wheel also checked and replaced the filters basement system filter April air 210 and second floor system 20+25+1 tested system operations and recommend to replace the air vent located on the boiler because it is compromised View visual findings from this job here - https://visionshare.xoi.io/?id=XA-EE1C-3DF39F660D8A4F8B8904507B6A30D53B Thermocouple replacement