Perofmred yearly maintenance and safety checks on Bryant ac system. Found 35/5 voltage absorption system reading 35/5. Cleaned condenser advised ive has grown into unit. May want to cut back. Customer is planning all Removing all ive in area. 23 degree deltat. No issues. Also perofmred yearly maintenance and safety checks on furnace. Cleared drain with co2 gun.flushed trap. Cycled furnace. Unit running with 9.67%o2. 15 ppm co in flu. 0 ppm co in supply. 111 degree stack temp. Cleaned sensor. 51 degree dletat. Replaced 201 filter. Leak at silinoid valve. Cannot replace part would need to replace humidifier. Hh9a customer stated she cannot do repairs at this time. No issues upon departure