Jandy Lite 2 fires and then goes out.

[Soundy]

So I was getting an FL 4, bad ignitor. Tested it and confirmed it had failed. Ordered a new one, installed it, turned it on... got FL 0.

Ran a backwash (it looked nasty in the filter glass), tried again... it fires, burns for a few seconds, then shuts off with no error code. Normally when it's firing, the little flame animation starts going, but in this case it doesn't.

Confirmed that the clock is set properly and the operation isn't stopped by schedule (it's 6:30pm; schedule is 8am to 8pm).

Any suggestions on what to check next? It was working fine before the ignitor went.

 

[ajw22]

Sounds like a flame sense problem.

Heater Flame Sensing - Further Reading

www.troublefreepool.com

Maybe @1poolman1 @swamprat69 knows how the flame sensor works in your unit.

 

[1poolman1]

Flame sensor is a part of the far-right burner. Rather expensive to replace. The tray can be removed and it can be cleaned with a mild abrasive like a Scotch pad. A newer dollar bill actually works well to clean a flame sensor. Just abrasive enough to remove any light coating but won't damage the rod. Try it, it works. Old HVAC trick.