Cleaned & checked gas furnace. Inspected heat exchanger & flue venting. cleaned burners & flame sensor. Checked voltage & amp draw of motors. Main system: Clean and check humidifier, replace pad, checked water flow and drain. Replaced air purification medias for PureAir. Blower: 6.0A. Inducer: 0.43A . Temperature rise: 57 . Supply: 133 . Return: 76 . Second floor system: Replaced 3 air filters. Blower: L:2.2A. Inducer: .09A . Gas pressure: L: 2.0 inches water column. Temperature rise: 47. Supply: H:117 . Return:70 .