Gas heating preventative maintenance performed Check filter - 20x25x1 Clean flame sensor Inspect burners - Ohm test igniter: Inspect wiring for loose connections and/or hot spots - Check humidifier pad: Inspect exhaust flu - Set thermostat for heat Check amp draw on blower motor: 7.0 Check amp draw on inducer motor:1.37 Check delta T - 56° Furnace is in optimal running conditions