Cleaned & checked gas furnace. Inspected heat exchanger & flue venting. cleaned burners & flame sensor. Checked voltage & amp draw of motors. Replaced 1” air cleaner media. Blower: w6.6/7.3A . Inducer: 0.27/1.38A . Gas pressure: 1.6/3.4 inches water column. Temperature rise: W46/57 . Supply: 116/127. Return: 70 . I found customer has a humidifier that is not on the maintenance plan. Honeywell humidifier has clogged solenoid valve. Needs new valve. Work suggested: Replace humidifier $716 or: Replace solenoid valve: $295. Install supply valve on Cold water line: $250. Humidifier cleaned and check, w/water panel: $54. Maintenance plan discount will apply to prices quoted.