Question about Jandy Laars Lt 400,000 Btu Heater

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Pool controls act as if not getting power- bad control board?

I am not able to engage the heater- the power panel acts as if it is not getting power, but the pool equipment in general is running. Is it possible the control board is bad and approx. how much to replace it vs. new heater? The heater is 6 years old.

Posted by renayed on


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Thank you for posting your question here on

I would suggest you hire a local pool heater technician to diagnose the problem for you. Any decent tech can ID the problem and likely have it fixed in an hour or so and it could be something as simple as a blown transformer which with parts and labor would be under $200; far less than a control board and a fraction of the cost of a new unit. Questions to ask a potential tech would be how much an hour? Is there a service call or travel fee? Do you carry replacement parts on your truck or stock them nearby? How long do you guarantee your work?

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


Posted on Apr 05, 2010


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