Question about Teledyne Laars Laars Lite 2 Pool Heater 125,000 Btu / Propane Gas

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MY Teledyne Laars is 20 year old +

Cleaned filters, cleaned gas offices(mechanically), used blown air, took out filters and ran without them to increase water flow, pilot light is running fine...water is circulating fast...yet does not fire. What gives? Before I used to tap, w/ plastic mallet, the Aluminum alloy(?) control box and then it would fire up. Is there a valve in there that might be a bit sticky??

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  • Teledyne Laars Master
  • 3,543 Answers

Check pressure switch (looks like space shuttle copper wire one side 2 wires other side) need 24 volts ac both sides if not need new

Posted on Jan 14, 2016

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Posted on Jan 02, 2017

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SOURCE: Where can I download an instruction manual for

You can download some information from;
http://www.manatron.net/Pdf's/JANDY%20MANUALS/heaters.pdf

This will give a parts list, applications and diagram.

Posted on Mar 27, 2009

  • 139 Answers

SOURCE: starting a teledyne laars heater

check for proper millivolt reading( 400-600).it could be 20 different problems and/or components

Posted on Jun 21, 2009

  • 279 Answers

SOURCE: Burner cycles on and off within 2-5 seconds.

Sounds like the flame sensor. If the sensor doesn't see a flame, it shuts off. Good luck...Lee

Posted on Nov 06, 2009

  • 3 Answers

SOURCE: Teledyne Laars LD250 Propane Pool heater cycles on and back off

Do you replace the thermopile or check the milivolts?
Check the Pressure gas
You need replace all of them terminals and check again the milivolts at the gas valve

Posted on May 29, 2010

  • 33 Answers

SOURCE: my heaters pilot wont stay on and ive replaced the

Problem with the thermocoupler its not producing a minivolt of 250 plus that is needed to open the main gas valve

http://www.laarsman.co.uk

Miles

Posted on Jun 05, 2010

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I have a Teledyne Laars XE and it came with the house I just moved into. It's at least 15 years old and whenever I try to heat up my spa (it's natural gas), it won't get above 80 degrees,


It sounds like its either the temperature sensor (thermistor) or the control board. If you remove the control panel you will see two gray wires that plug in the back next to each other.
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If your readings were pretty close, it is probably the control board having trouble, but be warned they are not cheap, about $350. Tell you pool store what you are doing and some will loan you a good board to plug in just to verify whether or not that was the problem.

Who ever you buy from, make sure they have a return policy. Some companies will not accept return on heater parts that have been removed from the original packaging.

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Locate the pressure switch within the safety circuit and jump the two wires that are connected to it. Be sure the power is off when doing so. Then you can power up the unit and it should fire assuming all the remaining safety circuit switches are closed. DO NOT RUN this for more than a few moments as you can damage the heat exchanger rather quickly operating the burners without water flowing thru the heater.

John

Nov 09, 2010 | Teledyne Laars Laars Lite 2 Pool Heater...

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Ignites then goes out after 10-20 seconds


Problem with the thermocoupler its not producing a minivolt of 250 plus that is needed to open the main gas valve

http://www.laarsman.co.uk

Miles

May 16, 2010 | Teledyne Laars Laars Lite2 Heater 400000...

1 Answer

Laars Teledyne Pool heater flames on for 2 seconds, shuts off


You have no flame rectification.....LLD series heaters check for a signal through the flame to ground; if the module does not detect this signal, it go through two more trials for ignition and then lock out the module. There should be a flame rod and it may need cleaning. I use steel wool.

May 30, 2009 | Teledyne Laars Laars Lite 2 Pool Heater...

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Laars Teledyne Pool heater flames on for 2 seconds, shuts off


pull out flame sensor and clean with sand paper or emmoring cloth then try again should work (small black wire with sensor sitting above burners)

May 05, 2009 | Teledyne Laars Laars Lite 2 Pool Heater...

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