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

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LAARS LITE 2 HEATER

THE HEATER WORKS BUT AFTER ABOUT 15-20 MINUTES A CLICKING SOUND SEEMS TO BE COMING FROM THE GAS VALVE - ANY THOUGHTS?

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Sounds like a flame recification fault change flame sensor or thermal couple and get unit serviced

Posted on Jan 17, 2010

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I have a laars lite 2 manual controls natural gas. The unit starts up runs strong for 5 mins shuts down restarts runs for now only seconds and shuts off


sounds like the hi limit switch is shutting it down,because it is not getting enough water,cloged filter, valve to heater notopen,bypass valve not closed,open up the water releif valve with the pump running should be alot of water running coming out of it.

Jun 13, 2010 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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Laars Lite 2 Gas-Pilot stays on, but main burner shuts off 10 min


A polit generator produces about 750 MV without a load. Under load it will drop to about 200-250 MV. If the system is working don't worry about it. If the system is not working replace the pilot generator and retest. Pilot generators usually go bad slowly.

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just replace the valve all together, sounds like its seized and dont mees with it just get a new one for safetys sake.

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

1 Answer

No able to lite pilot


make sure gas supply is there also clean the thermocouple, if it is fowled or dirty the pilot wont stay lit nor will the main gas valve open

May 24, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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If the pilot flame is not strong enough, it will not tell the gas valve to open, or if the gas valve is not getting the signal to open, it won't. Check all wire connections at the thermostat and gas valve. Check ground wires. Clean the pilot light and flame rod.

Aug 31, 2008 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Pilot stays lit, but burners underneathe do not light up or burn.


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Aug 31, 2008 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Laars Lite 2 Pilot will not light


If you have not found the problem yeat, it IS the thermocoupling( or pilot generator(same thing))
You may test by placing a multimeter on the red and white leads coming to the gas valve. you do not need to disconnect the leads first but you can

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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

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