Removed and cleaned and reinstalled flame sensor Removed and cleaned and reinstalled gas burners Checked gas outlet pressure Checked igniter Checked filter And replaced Inspected and tested inducer motor and blower motor Checked your condensate drain trap Furnace working well at this time Checked humidifier and replaced water panel Water on floor around dehumidifier, caused by drain line having no down slope. I adjusted unit for downslope. Water should be gone in a day or two Tune ups maintain warranty