Removed and cleaned and reinstalled flame sensor Removed and cleaned and reinstalled gas burners Checked gas outlet pressure Checked igniter Checked filter Inspected and tested inducer motor and blower motor Checked your condensate drain trap Furnace working well at this time Igniter and inducer potentially on their last season Removed cPVC 90 from blower compartment Heavy water damage in furnace box As life expectancy of this furnace is 14years recommend replacement before further breakdown