Cleaned & checked gas furnace. Inspected heat exchanger & flue venting. cleaned burners & flame sensor. Checked voltage & amp draw of motors. Replaced air filter. Checked drain. Blower: m:1097, 2.3/5.5A . Inducer: 0.18/0.45A . Gas pressure: 1.8/3.8A inches water column. Temperature rise: 52. Clean and check humidifier, replace pad, checked water flow and drain.