Jandy lite2 LJ250N Replaced igniter Getting F4 error .. Checked fuses OK Don't know what to check next or how to verify igniter is getting any electricity.

SOURCE: Jandy Lite2 Pool heater will not stay lit after firing.

Look at the sensor that tells unit that everything is lit. There should be some sort of sensor that tells the ECU that the ingnition area is a burn temp. It sounds like the unit can't tell that flame is lit. Hope this helps.

SOURCE: 1990 Jeep YJ 6 cyc. Won't Start---No Spark From Coil

It would be great if you could find the Ignition Control Module!!! From my experience on my Jeep...90 YJ 4.2 liter carb. it does not have one...Computer controlled only...

SOURCE: jandy lite2 heater has fl5 error code, all voltages look good

If all voltage test points are within range, then it's 1 of 3 problems: Power Conversion Plug is faulty; Power Control Board is faulty; or Controller is faulty. Jandy says there is no way to test any of these directly. They recommend that you replace both the Power Conversion Plug (~$35) and the Power Control Board (~$230). Apparently when one fails, it can cause the other to fail as well. They said that unless the Controller has a lot of corrosion on it, then it probably is not the issue.

SOURCE: I am getting an FL 2 error code

Look at the list of codes inside the cover of the heater. Your owners manual should have a complete remede for all codes.

SOURCE: Jandy Lite 2 LJ will not ignite

water is leaking down onto the burner putting out the heater????