Furnace problems - 3 lights, any solution?
Hi, my Atwood 8535 IV does not want to keep going. It fires up, it blows, the burner comes on but as soon as the electrode stop clicking, the flame stops. It tries 3 times then I get a 3 shot flashing...
Forum Discussion
Kidoo wrote:
Here is an interesting subject about the signal from the electrode, still don't know how it does it.
http://electronics.stackexchange.com/questions/148405/how-does-a-flame-sensor-or-thermocouple-operate-with-just-one-wire
Flame ionization
A 'milivolt' signal is generated by the flame when burning.
That milivolt signal is what circuit board uses as flame proof ie: main flame is lit..OK to keep gas valve Open
Being a milivolt doesn't take much to interrupt it
HERE is a better description of 'flame sensing'
