Question about Jandy Laars Lt 400,000 Btu Heater

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Heater doesn't come on

My Jandy LT 400,000 doesn't come on. When I turn it on the blower doesn't come on and in a minute or two the service and high pressure light comes on. What could the problem be and what do I do?

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  • Jandy Master
  • 3,539 Answers

Check pressure switch and copper tube

Posted on Mar 05, 2016

6 Suggested Answers

  • 1 Answer

SOURCE: low pressure reading on Pool Heater

I had this problem with ours last year. I replaced the water pressure switch and it began working fine. We later had a symptom that the blower would start but it would not ignite. The ignitor rod was corroded so I took it out and sanded it with some sandpaper---worked fine...until I dropped it trying to reinstall and it broke. Bought a new one and it works fine now.

Today's problem is related to the blower now.... it is always something, isn't it?!?

Posted on May 30, 2009

  • 128 Answers

SOURCE: Jandy LX250 LT Pool Heater High Limit Switch

Jump the High limit switch. If it fires the switch is bad

Posted on Aug 23, 2009

  • 8404 Answers

SOURCE: Jandy Aqualink RS4 randomly turns on blower, pump, heater

Re program your assorted timer functions and make sure you set AM and PM or use a 24 hour clock. I think your model allows for a 24 hour clock setting but I am not certain.

I hope this helps you

a

Posted on Oct 09, 2009

  • 246 Answers

SOURCE: My Jandy LT 400k heater shuts off when the fan

my guess is you are a pool guy so im not going to awser this one

Posted on Oct 15, 2009

  • 246 Answers

SOURCE: getting error code 188E on Jandy Model LT Lite 2

press the arrow key for 10 sec this will reset the heater. if code replace control board, if not enter time date and set temptures for pool and spa

Posted on Oct 16, 2009

  • 2 Answers

SOURCE: service light and ags light comes on after a minute or two

I had this problem. Jandy ended up replacing the burner from day 1 with the heater (LT400 propane). It was a manufacturing defect. Of course it took 5 trips from the "warranty" company to not fix it before they finally punted to Jandy. Then, there's only one Jandy service rep from VA to ME (I'm in PA).

Posted on Apr 02, 2010

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1 Answer

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Service light and ags light comes on after a minute or two


I had this problem. Jandy ended up replacing the burner from day 1 with the heater (LT400 propane). It was a manufacturing defect. Of course it took 5 trips from the "warranty" company to not fix it before they finally punted to Jandy. Then, there's only one Jandy service rep from VA to ME (I'm in PA).

Jan 27, 2010 | Jandy Laars Lt 400,000 Btu Heater

1 Answer

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Oct 08, 2009 | Jandy Laars Lt 400,000 Btu Heater

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May 25, 2009 | Jandy Laars Lt 400,000 Btu Heater

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