Before you start using this troubleshooter, be advised, this can be extremely dangerous, you can be killed and your home can be destroyed, by following any instruction or advice within this boiler troubleshooter you assume any and all responsibility for anything that happens as a result of using this furnace troubleshooter, by clicking on the continue button below you agree that you have read and understand this warning.
IT IS ALWAYS BEST TO CALL A PROFESSIONAL!

On this and the pages to follow I will show you how to troubleshoot your natural gas or LP gas fired hot water boiler or furnace that uses a standing pilot, for furnaces or boilers that have any type of electronic igniter, please see this link. Although this troubleshooter is mainly for standing pilot boilers, many of the instructions will apply to boilers with an electronic or hot surface igniter. Many no heat problems have nothing to do with how the gas is ignited. and this is the only difference between a standing pilot and an electronic or spark ignition fired boiler or furnace.