Removed and cleaned and reinstalled flame sensor Removed and cleaned and reinstalled gas burners Can not Check gas outlet pressure Checked igniter Checked filter and replaced Inspected and tested inducer motor and blower motor Checked your condensate drain trap Did not check dehumidifier Furnace working well at this time Tune ups maintain warranty Follow up on thermostat with Dan Fox On of the two arms to take power from the battery on the tstat is not on the thermostat