Cleaned & checked condensing gas furnace. Inspected heat exchanger & flue venting. cleaned burners & flame sensor. Checked voltage & amp draw of motors. Test capacitor. Replaced thermostat batteries. Replaced 1” filter with 4” media. Replaced UV lamp for APCO air purifier and swapped leads. Customer replaced humidifier pad. Cleaned & checked condensing gas furnace. Inspected heat exchanger & flue venting. cleaned burners & flame sensor. Checked voltage & amp draw of motors. Test capacitor. Replaced thermostat batteries. Replaced 1” filter with 4” media. Replaced UV lamp for APCO air purifier and swapped leads. Customer replaced humidifier pad.