Completed heating maintenance on three carrier gas fired furnace and a Navien gas water heater tankless system. checked and cleaned burners and igniters and the flame sensors also checked mechanical and electrical components highly recommend to replace the blower assembly and motor and blower wheel with the capacitor for the second floor furnace due to the blower motor being off balance also replaced filters 20+25+4 2 filters and one 14+30+1 and replaced two electrode canister one for the first floor system and one for the second floor system also recommend to replace the capacitor for the first floor blower. -/-/-/-/- High efficiency Hot Water heater (Navien tankless) Perform a tune-up and cleaning to help ensure reliable and safe operation. Inspect for cracks & deterioration of Heat Exchanger Check and clean Burners an heat exchanger- ok, vacuumed-ok Checked and cleaned flame sensor and ignition Assembly- NOTE: Igniter assembly must be replaced. Check Safety Controls-ok Check electr