Trane service call Tested the unit upon arrival and found only the first burner of 3 was lighting and going off on flame sensor error code. Removed all 3 burners and gave them a good scrub with sand cloth and also made sure the orfice for all 3 burners were clear of any obstructions. Tested unit in low and high fire and have no more flame issues. Tested all components of the unit to ensure that there was no other issues. Unit is working safely and efficiently Customer will pay by e transfer