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  1. #1
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    Sep 2016
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    9 flash code(York 5ton Sunline)

    No heat . No lights on board, check transformer and nothing. Tested around and found it shorted. After replacing I turn unit on and get 9 flashes. 24 volts at limit terminal. The ignition board is blinking normal heartbeat. Cycled power same thing. Inducer doesn't run, just indoor blower. Reset button does nothing. Checked contactor coil with ohms meter, not shorted running around 10 ohms(double) and 6 ohms(triple). I read a similar post and was wondering if I could get the troubleshooting guide on this problem that seemed to have helped everyone. I avoided asking for it on the original post. Also any suggestions on what I should check next. Thanks.

  2. #2
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    What does the chart say for 9 flashes?

    Sent in a state of increasing entropy using Tapatalk

  3. #3
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    Detailed diagnostics would need to be in the Pro area. It's free to apply, and the link is at the bottom of this post.
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  4. #4
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    Did you check the limits in the heat exchanger compartment?

  5. #5
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    Sent in a state of increasing entropy using Tapatalk
    Last edited by R600a; 11-19-2019 at 08:45 PM. Reason: Wrong thread.

  6. #6
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    Sep 2016
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    Thread Starter
    Quote Originally Posted by timebuilder View Post
    Detailed diagnostics would need to be in the Pro area. It's free to apply, and the link is at the bottom of this post.
    Alright, thanks.

  7. #7
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    Thread Starter
    Everything checked out.

  8. #8
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    Quote Originally Posted by Red850kid View Post
    Everything checked out.
    Pressures were fine sh and sc were where they should be
    Honeywell you can buy better but you cant pay more

    I told my wife when i die to sell my fishing stuff for what its worth not what i told her i paid for it

  9. #9
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    Sep 2016
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    Thread Starter
    Quote Originally Posted by crazzycajun View Post
    Pressures were fine sh and sc were where they should be
    I tested every component in the ignition circuit. The ignition control was indicating a normal heartbeat. After this, I removed 24 volts from a component to see if I would get the corresponding flash code for the open switch. It would instantly show the correct flash then return to the normal indicator when I hooked it back up. I then disconnected the thermostat wires and cycled the power. Again just the indoor fan with a 9 flash on the simplicity control. I check fan termials on the lower left of the simplicity board and they measure 24v to blower contactor. I disconnect and check limit termial and there is 24v. I swapped the simplicity board this morning with a unit nearby as they were the same. It worked out and I monitored it as it went through a couple heat cycles. So I picked up a new one and its running. I hung onto to the old board just in case.

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