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...
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Next step, I bypassed the sail switch, still not working. Like you say, the sail switch must of functionned properly, it must close the contact for the circuit board to send a signal to the two propane valves on the furnace and to the ignition. Flame comes on but it quits as soon as the ignition stops.
I just do not get it that the electrode sparks but would not send a signal to the board? How can it send a signal and receive a signal, pure mistery to me.
I will try a new electrode. I did clean up the burner grill and the electrode and the ceramic seems ok but maybe it does not send a signal back to the board. The electrode is set as it was for years before so I do not think it is not at the proper place. I did check the 1/8" space.
I just do not get it that the electrode sparks but would not send a signal to the board? How can it send a signal and receive a signal, pure mistery to me.
I will try a new electrode. I did clean up the burner grill and the electrode and the ceramic seems ok but maybe it does not send a signal back to the board. The electrode is set as it was for years before so I do not think it is not at the proper place. I did check the 1/8" space.
