Furnace Flame Rectification Safety on Older versus Newer Furnaces!

In this HVAC Furnace Video, I go over what the flame rectification safety looks like on older intermittent pilot controlled valve furnaces compared to newer direct ignition whether spark or hot surface ignitor forced air gas furnaces. I show the fundamental differences in safety in how the flame proving assembly is built. I go over why the newer furnaces are able to prove a flame on all burners more effectively for safety. I also go over what to look for to get a good flame rectification signal on the furnace.