Had burner from canceled job. John Hutton to attach to call from truck stock. Pulled burner and cleaned, reassemble system and tried to get going. Found burner flame sensor failed. Installed new burner in 4 year old unit and cleaned combustion area to ensure burn is good Tested with multiple cycles and working properly at this time System must stay clean and clear of dust and debris to ensure proper operations. 2 year warranty on burner only.