Question about Teledyne Laars Laars Lx Pool Heater / 400,000 Btu / Propane Gas

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I have a teledyne laars platinum 2. Model: LLD400N-B. Hot surface ignitor glows but no flame? I'm trying to help my father over the phone long distance, any advice would be great.

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  • Teledyne Laars Master
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Check to see if 24 volts ac to the gas valve if not bad gas valve or no gas supply to it

Posted on Mar 19, 2016

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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on Jun 28, 2009

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Heater will not ignite


  1. Do you have a standing pilot style heater = Milivolt
  2. or is it an IID = Spark style ignitor
  3. Or... Hot surface Ignitor = glows red hot like an auto cigarette lighter?

Most common problem I have come across over the last few weeks, is pressure switch not closing, meaning - dirty filter. Try cleaning your filter: backwash or rinse cartridges.

  1. is pilot staying on, and burning well?
    1. If so, is htr's gas valve in ON position?
  2. Do you hear sparking?
    1. If No, then one of the safety switches is keeping heater from firing...
      1. Toggle switch - on/off
      2. Thermostat - turned up high?
      3. Pressure switch - closes circuit when pump comes on
      4. 2 each high limits
      5. Fusible link / roll out switch
    2. If yes, either gas valve is off, is bad or the Ignition module is bad? Some call it grey box.
      1. You will need to test for voltage at the common and MV posts of the gas valve - 24 to 28 volts. If voltage = bad gas valve; if no voltage = bad IID Module (Intermittent Ignition Device)
  3. Do you see a bright red glow in the burner tray area?
    1. If yes, either fuel supply is off, or Ignitor has worn out and the glow is not hot enough to ignite raw fuel.
    2. If no, check voltage at Ignitor - depends on make and model of heater- could be as low as 24 volts and as much as 110 volts. So... No voltage at the supply wires = bad sending component, again depend on brand and model, could be ignition module, could be circuit board?
    3. If yes voltage, bad Ignitor
      1. Again, this is if fuel supply is confirmed.
Good Luck

May 08, 2015 | Teledyne Laars Laars Lite 2 Pool Heater...

1 Answer

Laars pilot not glowing


remove wires to ignitor see if voltage to them if so bad ignitor if no voltage check safety circuit

Jun 05, 2014 | Teledyne Laars Laars Lite 2 Pool Heater...

1 Answer

Laars lx won't ignite


hot surface igniter may not be hot enough to ignite the burners

Jan 09, 2013 | Teledyne Laars Laars Lx Pool Heater /...

1 Answer

Heater will not come on...gas flows but no igniton...measured voltage to the ignitor=92vac..resistance of ingitor= 60 OHMS


Ive never heard of an ignitor on this model getting 92 VAC. It should be 120 volt.
If the ignitor is getting voltage when it is supposed to , but its not glowing like normal, replace ignitor. And also find out whats up with your electrical.

May 06, 2011 | Teledyne Laars Laars Lite 2 Pool Heater...

1 Answer

Teledyne laars model #LLD400N nat gas input 999,000 btu"s everything fires up...just no heat.


check for the manual bypass if closed water passes through to fast and doesn't heat if open water bypasses heater and heater starts to shake then shuts off

Jan 26, 2011 | Teledyne Laars Pool & Spa

1 Answer

Hi E2 will not lite gives me a ignition lock out code


it try to turn on 3 times thant lock out. turn off breakers for 10 sec and turn back on. this will unlock the heater but? what is making the heater not to work is due to not flame at all this may have several possibilities like gas valve ignition control hot surface ignitor etc,etc, etc,

Oct 09, 2009 | Teledyne Laars Pool & Spa

1 Answer

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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