Cleaned & checked gas furnace. Inspected heat exchanger & flue venting. cleaned burners & flame sensor. Checked voltage & amp draw of motors. Test capacitor. Replaced air filters. Clean and check humidifier, replace pad, checked water flow and drain. Blower: 8.6A . Inducer: 1.4A . Abj Gas pressure: 3.6 inches water column. Temperature rise: 51 . Supply: 71 . Return: 122.