Question about Lite On Laars Lite 2 Heaters: 250,000BTU MV Heater

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Laars lite 2 heater direct ignition problem

The direct ignition is intermittent. Some times the coils heat to light the propane and sometimes they don't. aAe there possible cuases I can look for?

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Re: Laars lite 2 heater direct ignition problem

Sounds like the controller (board/coils) that send voltage to the heat coil is acting up.trace the wire from the heat coil back to the component.make sure the ground wire (green) is grounded to a clean surface.

Posted on Oct 29, 2007

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My Laars 2 lite pool heater will not ignite, I have the same problem every year for the first ignition. The pilot is lit. I removed the filter to make sure it is not the pressure.

you might need to bleed the line to get fuel to the heater core. If there is a bubble in the line it will prevent the heater from working. Usually, there is a bleeder valve on the heater unit -- unscrew this and let some of the fuel drain out (into a container) and give it another shot. It should light right up after bleeding the line. If the fuel that you took out of the bleeder valve looks clean, you can then put it back in the fuel tank and it should be fine.
If this is a natural gas heater, there will be no bleeder valve -- you should have it looked at by a professional repair person. Natural gas is very dangerous and should only be repaired by a qualified professional to avoid serious injury or death.

May 27, 2011 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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My pool heater turns on, runs a few minutes, the igniter lights and the heater heats for about 3 minutes, then turns off. I see a SERVICE comment blinking and SW2 is also blinking.

im not sure what filter you have on there but do a good cleaning if its D.E acid wash it if sand clean the sand. your not keeping enuff pressure to keep it lite. take it slo

Oct 15, 2010 | Lite On Laars Lite 2 Heaters: 250,000BTU...

2 Answers

Pilot lights but no full burner. thermopile ok any ideas

If thermopile generates 700mv...the stat is ok and no open limit then it is bad valve...touch the 2 thermopile leads direct t TH and PP on valve to bypass limit and stat...if it works direct...then a limit or stat is open

May 11, 2010 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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Basically everything in the Laars Lite 2 heater

If this is a millivolt system then ALL your wiring connections have to be clean and tight. If there is just 1 connection that is not tight or corroded a little, then you will have your millivolts drop and it may not be enough to keep the main gas valve coil energized and the gas valve will drop out. Check your connections, including any crimped connections and wire nutted connections. Also check for any wiring for any worn insulation where the exposed wire may be grounding out. Hope this was of some help to you!! Good Luck!!

Nov 30, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

2 Answers


the thermocouple not only keeps the pilot on but lets the gas valve know its okay to open on a call for heat, remove your thermocouple and clean it with a fine grit sandpaper and if this doesn't work replace it all together.

Jun 02, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Will not ignite

First check thermostat is calling for heat or if gas valve fault get unit serviced

Dec 10, 2008 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Laars LJ 175 Hot Surface ignition Problem

sounds like a board problem.has it been working and this a sudden problem or is it a new heater that you are trying to put into operation?

Jul 10, 2008 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Laars lite 2 Spark egnighter will not spark

turn power off first. I would disconnect igniter wire which will be a thick orange wire that comes off of ignition module if it is spark. once you have that the end will look like a spark plug wire take shield away from metal then hold orange wire in hand close but not touching metal turn power on and it will take a couple of minutes before it should start sparking. If you don't see a spark then it is most likely the ignition module. There should be a red light on ignition module that will blink to tell you what the failure is if is is a newer on. When you turn power on to laars light 2 the inducer motor should come on then a pressure switch should send 24volt to gas valve for pilot to lite.Can you smell gas at all when laars should be igniting. If you have any questions fell free to email me back

May 10, 2008 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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