Question about Jandy Laars Lite2 Ld 400,000 Btu Heater

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Heater will not light off

Electric glow ok. pressure switch continuity ok. no gas flow.

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  • martinsteven Dec 22, 2008

    Thanks for the reply. The ignitors are working. I checked the flow switch and that is working. The gas valve is not opening. Can you specify how to check the gas valve continuity?



  • ifixpools May 11, 2010

    Has the gas recently been turn off? If so, you may have air in the line. When the ignitor glows, you need to listen for a click. If you hear a click, the gas valve is opening so there should be a gas flow. If there is no click, the ignition control could be bad as it is not relaying the signal to the valve. This would require a volt meter at the valve output to check for 26v. At times, a bad ignitor will glow but have insufficient resistance to ignite.

  • ifixpools May 11, 2010

    The next step is to determine voltage from the ignition control o the valve. You need to verify voltage with a meter attached o the yellow wire on the transformer and the orange and then brown wire to the valve.


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Be sure filter not dirty or too old lack of flo can cause tripping of high heat switch check flo switch also always check simple things 1st traceace

Posted on Apr 06, 2009

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