Performed seasonal precision tune up on heating systems; cleaned burners, tested ignition components, adjusted gas levels, tested safety circuits, checked indoor motors, checked all electrical components, tested indoor air flow, checked heating temperatures, and tested overall furnace operations. Returning next week to clean blower wheels on both furnaces. System replacement is recommended. Humidifier precision tune up and cleaning. Remove current water pad, clean off pad housing and water distributor. Clean out humidifier box. Clear out drain line. Replace with new water pad. Test operation.