Atwood 7916 intermittent lighting
My Atwood 7916 furnace will light sometimes but then not other times. It will try to light 3 times (3 clicks of the igniter) after which the blower will blow cold air until I turn the thermostat off. ...
Forum Discussion
RV furnaces try 3 times to "prove" the flame. Yours having trouble proving and measuring the flame. There is a flame rod in the flame that conducts a very small DC current as long as the flame is established. As quickly as that signal is no longer present, the sensors on the control board kill power to the gas valve and safety off to prevent unburned gas from collecting which could cause an explosion. Your furnace is doing exactly what it's supposed to be doing. You need to figure out why or hire someone knowledgeable to fix it.
