Jandy JXi 400N Not Igniting

[Mafuba]

This post will be super similar to the one by @b2cperson here: Jandy JXi 400N Not Igniting - Help
I have almost the exact same issue, except I DO have gas flowing from the valve into the blower. It sounds like @Jrock817 had a similar issue. I'm hoping someone like @JamesW, @setsailsoon , or @swamprat69 can help.

To recap:

I opened my pool about two weeks ago. At the time, I was able to fire up the heater and it ran for about 6 hours before shutting down. I've used the troubleshooting guide in the "Workbook JXi Pool & Spa Heater" here: https://www.doheny.com/media/Pdfs/7609-instructions.pdf.

Background:
Chlorine Pool
Heater purchased and installed in August 2015

Behavior

1. Blower turns on and remains on throughout
2. After a few seconds of purging, the igniter starts to glow
3. After 35 or so seconds, I hear a clicking sound, ignitor stops glowing - no ignition
4. After another 30 seconds the ignitor begins glowing again, but fails same as above
5. Tries 3rd time, then shuts down with *** FAULT - CHECK IGN STEPS *** message

Steps Taken
According to the troubleshooting manual, I skipped to step 13 since the blower was on and working. Everything else seemed to checkout. I have now replaced:

1. Ignition Control Unit
2. Gas Valve

Observations:

• I noted that the two wires connected to the Exhaust Temp Fusible Link are blackened.
• The gas valve is opening and releasing gas (I cracked the union during operation after the click and gas was flowing into blower)
• None of the tubes are blocked, crimped, or cracked
• The exhaust is blowing at normal force and the blower intake has good suction, there does not appear to be any obstruction to airflow

Any help or suggestions about what might be the cause of this? I am at a loss and don't want to waste any more money on parts until I am sure of what it might be. I don't have a manometer so I haven't checked pressures. Any and all advice is welcome.

Thanks,
Jack

 

[Poolbreh]

What’s the last fault in the settings, I would probably start there. I would also check the ohms on the hsi. @PoolGate says he replaces them quite often. I would also check the flame rod and clean. Manometer will probably be needed is the heater on its own regulator? Make sure all gas valves are open, had a dog one time bump the gas valve partially closed.

 

[ajw22]

Replace your ignitor even though you see it glowing. Especially if it is 7 years old.

Get the new style ignitor. See Jandy LXI Heaters - Further Reading

Get a manometer and check your gas pressure if replacing the ignitor does not fix it.