Question about Jandy Lite2 LG400 Ceramic Compact Heater

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Pilot will lite but burners will not kick on - Jandy lite 2 400,000BTU pool heater Me too.. was able to fire it up by tinkering with the switch that goes from "Pilot" to "On", but doesn't always work. A technician recommended removing some of the wires and cleaning the wire ends and terminals with steel wool as condensation gets in there sometimes over the winter. I have no clue which wires to do this to - I haven't tried this yet - do at your own risk!

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  • dbehman Jun 01, 2009

    Thanks for post - however, my pilot does NOT go out - it stays lit all the time. I only moved the main gas valve from ON to PILOT in my tinkering around to get things working - it was not because the pilot had gone out. As I say, oddly enough one time when I did move it to PILOT and then back to ON, the main burners fired up right away. I've since tried that about 10 times with no success.

    Any other suggestions?

    Thanks again.


  • dbehman Jun 11, 2009

    Hi co7196 - thanks very much for following up!

    My father in-law (who is more handy with this stuff than I am, but still far from a technician) came over last week and tinkered with the heater for me. He told me that all he did was remove the wires one at a time and cleaned the terminals and the wire ends then put them back on. Ever since then the heater has fired up without a problem!!

    However, it now seems as though the thermostat is more sensitive. What I mean is that when I barely got it working several weeks ago, the thermostat dial (not a digital panel unfortunately) was set to about 2 o'clock and was butted up against a stopper to prevent it from going higher. It would then kick off at about 88 degrees which I thought was perfect. After my father-in-law tinkered, the pool got up to about 95 degrees before I realized that the heater now wasn't kicking off! If I turned the dial back to about 12 o'clock it seems now to kick off at about 90 degrees there.

    So perhaps by cleaning the wires and terminals, more of a signal is allowed to come through and the dial is actually now more correct?

  • dbehman Jun 11, 2009

    Thanks Ned! No need to apologize - its hard to fully diagnose a problem like this through the internet. :) I'm cautious about monkeying with wires and such anyway (one of the reasons why I let my father-in-law do it).

    Using silicone on the contacts is a great idea - I will try that. Thanks again!

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  • Master
  • 3,433 Answers

No, do not mess with wiring. If the gas does not ignite and the pilot goes out, The thermocoupler is faulty. This is the probe that should be sitting at the tip of the pilot flame. When it gets hot enough it allows the main gas valve to open when you put it to ON position. If the pilot light goes out, It shuts off the gas for safety. Summary, Bad thermocoupler. Easy, inexpesive repair. Let me know please, if you need further help.

Posted on Jun 01, 2009

  • 1 more comment 
  • Ned C Cook
    Ned C Cook Jun 02, 2009

    It still points to the thermocoupler. It's the boss of everything for safety reasons. Failure default is Nothing fuel stoppage to main burner. They don't cost much but can drive you nuts.

  • Ned C Cook
    Ned C Cook Jun 11, 2009

    Hello, Did you get your problem solved?

  • Ned C Cook
    Ned C Cook Jun 11, 2009

    As long as you got it working, that's the important part. It appears there aren't any markings to indicacte the remp setting. You turn the dial and watch the thermometer? If thats the case you may want to get the temp where you want it and mark the dial or its housing so setting it would be easier. Yes, the signal is cleaner now since your father in law took care of it. please accept my apology for telling you not to mess with the wiring. Just before my attempt to help you, i assisted someone who was told to do some wiring work and he ended up with a rats nest in his efforts . He also got too close to high voltage and didn't know the hazards of poking and pushing on relays with a screw drive. So trust me, it was only my preference you were forced into having someone on site to assist you. If this would help, I'd like to make a suggestion that would help keep your problem from reoccuring. Get a tube of clear silicone snd cover those terminals that had to be cleaned. It will stopmoisture and corrosion. Well, all is up and running and that's want counts. Enjoy. - Ned

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