Forum Discussion

Kidoo's avatar
Kidoo
Explorer
Aug 08, 2015

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 light, ignition problem?

I had my circuit board tested at an RV store and it checked OK, I connected another propane thank to it, no luck, I cleaned the electrode and checked the 1/8" measure, cleaned the burner, checked the two gaz valves and they are clicking good, the fans blows good.

I think it could be the electrode not sending a flame signal to the circuit board, but wonder if the board is good even though it checked good on the test?

Any idea?
Class A

32 Replies

  • enblethen's avatar
    enblethen
    Nomad
    Sep 02, 2015
    Just because a new board was installed doesn't mean it was a Dinosaur.
  • Bird_Freak's avatar
    Bird_Freak
    Explorer II
    Aug 24, 2015
    Kidoo wrote:
    Problem solved. I went to a shop and he first replaced the propane valve. It did not fix the problem but he said that these valves get dirty over time and does not distribute proper amount of propane. Since the valve was as hold as the RV, he said he did not want to replace something that could fix the problem and me comming back a while after with another furnace problem. This guy is a propane expert and he is next to a big campers site. He showed me an open one and it was quite dirty. It was also time to clean my fridge, it was felty, so 2 in 1.

    Then he replaced the circuit board and it fixed the problem. I had this circuit board tested by another RV place a couple weeks ago and it tested good. So even though the board tested good, there are good chances that it is not. functionning properly.
    Told you so!:B
  • Kidoo's avatar
    Kidoo
    Explorer
    Aug 18, 2015
    Problem solved. I went to a shop and he first replaced the propane valve. It did not fix the problem but he said that these valves get dirty over time and does not distribute proper amount of propane. Since the valve was as hold as the RV, he said he did not want to replace something that could fix the problem and me comming back a while after with another furnace problem. This guy is a propane expert and he is next to a big campers site. He showed me an open one and it was quite dirty. It was also time to clean my fridge, it was felty, so 2 in 1.

    Then he replaced the circuit board and it fixed the problem. I had this circuit board tested by another RV place a couple weeks ago and it tested good. So even though the board tested good, there are good chances that it is not. functionning properly.
  • Bird_Freak's avatar
    Bird_Freak
    Explorer II
    Aug 10, 2015
    Kidoo wrote:
    wa8yxm wrote:
    RE: Sail switch: If it is bad unit will not attempt ignition

    Question you said it tries 3 times, DOES IT LIGHT all 3 times or not?

    If it is not lighting do you hear the Snap Snap SNap of the ignition system?

    If Snapping,m but no flame.. Gas jet may be clogged or solenoid bad.

    If lighting, clean the electroid, it may be bad also the connection between the Mother board and the burner sensor/ignition point.

    If that does not fix.. I'm guessing the tester at the dealer gave a false good on the board..

    Mine the board was bad.. I went with a Dinosaur board replacement and well.. I was impressed by the design and quality of this board. MaDe the OEM look like... Junk.


    It does ignite and burns 3 times, the heat comes on every time then it dies with 3 lights.

    I saw the Dinosaur board. Did you install it like plug and play or did you have to relocate some wires?
    Kido, I have the same system you do. I also used the Dinosaur board and it just plugged in.
  • Kidoo's avatar
    Kidoo
    Explorer
    Aug 09, 2015
    Old-Biscuit wrote:
    Kidoo wrote:
    Humm..., I still do not see how current can flow TO and FROM, pure magic to me...


    Speed of electrons!

    Milivolt is generated when flame light then flows the instant high voltage for spark stops


    Must be real instant because the flame stops as soon as the clicking stops!
  • Kidoo's avatar
    Kidoo
    Explorer
    Aug 09, 2015
    wa8yxm wrote:
    RE: Sail switch: If it is bad unit will not attempt ignition

    Question you said it tries 3 times, DOES IT LIGHT all 3 times or not?

    If it is not lighting do you hear the Snap Snap SNap of the ignition system?

    If Snapping,m but no flame.. Gas jet may be clogged or solenoid bad.

    If lighting, clean the electroid, it may be bad also the connection between the Mother board and the burner sensor/ignition point.

    If that does not fix.. I'm guessing the tester at the dealer gave a false good on the board..

    Mine the board was bad.. I went with a Dinosaur board replacement and well.. I was impressed by the design and quality of this board. MaDe the OEM look like... Junk.


    It does ignite and burns 3 times, the heat comes on every time then it dies with 3 lights.

    I saw the Dinosaur board. Did you install it like plug and play or did you have to relocate some wires?
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Aug 09, 2015
    Kidoo wrote:
    Humm..., I still do not see how current can flow TO and FROM, pure magic to me...


    Speed of electrons!

    Milivolt is generated when flame light then flows the instant high voltage for spark stops

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