Moved from here.
I have the exact same problem "fault check IGN" and my Jandy JXI heater is 2.5 years old. I tried a few times to put the heater on, and now it trips all the breakers and the whole pool shuts down.I have a JXI that is 1.5 years old and is now not igniting. I sometimes hear it fire up and I can feel the heat from the blower for a few moments and then it turns off.
Other times, it does not ignite as shown in this Video here
The only error I have seen it display is "fault check IGN"
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