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

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Model llg250n-c i can light the pilot,but when i turn the main gas on it try to light the main burner and it goes out .then i have to light the pilot again.can you give me any help.

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Ignites then quickly goes out

Posted on Jun 24, 2008

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1 Answer

Burner lights and goes out


It may may be the safety system for pilot light is maladjusted. There is a sensor which has to be heated by the pilot light or the valve shuts down altogether. If the pilot light stays lit then you check to see if it is positioned to light main burner.

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try cleaning the pilot sounds like its a short pilot and when the burner comes on it pulls the gas from the pilot light .

Feb 22, 2013 | Heating & Cooling

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How do i light pilot light?


Remove front cover,or just lower section if you can. they usually just need to be lifted up about an inch or so and pulled out. However some have covers that snap in place. After you remove cover locate gas valve. It should have a control knob on top with markings for on, off, and pilot. Set control to pilot. Follow lines from gas valve to burner compartment, one goes to main burner one ,small copper colored line is the thermocouple, other line is the pilot. Turn thermostat down as far as it will go. Make sure gas supply valve in line to heater is on and then depress pilot control , when you have pilot control depressed have a match or other small flame source close to pilot assembly. If it lights then hold down on pilot control for a couple of mins. Slowly release pilot control and if it stays lit turn gas control to on. Turn thermostat up to call for heat and burner should light. If pilot doesn't stay lit when you release pilot control then try again holding pilot down longer. If it still won't stay lit then thermocouple will need replace. Good luck. Thanks

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1 Answer

Burner will not light. With the pilot light burning and the gas is turned-on to ignight the main burner the pilot light goes out.


call aservice tech your pilot light might be blocked therefore the pilot flame might not be strong enough to handle the puff of gas when the gas valve opens ps. if the unit is off in the summer spiders are usually the problem. Hope this helps

Aug 19, 2010 | Endless Summer Heating & Cooling

1 Answer

Pool Heater Light main burner then goes out


take millivolt reads while main burner is on.i suspect you will see a drop in voltage until you get to point where it will no longer operate burner(around 200mv).if this is the case you probably have poor pilot characteristics due to dirty pilot,pilot out of adjustment ,obstruction or insufficient gas pressure

Jun 21, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Propane patio heater ignition problem


I would change the thermocouple and here is why:

The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to sustain burning the gas fuel from the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
How the Thermocouple Works
So what is this thing and how does it work? Well the thermocouple (technically called a thermocouple junction) is a device that contains two metal wires welded at the ends and placed inside a protective metal case. The thermocouple sensor is found at the business end of the pilot flame and is designed to be placed in the hottest part of the flame. The other end is connected to the pilot valve body. As the thermocouple heats up, it produces a small amount of electricity and when it gets hot enough from the pilot, send a signal to open the gas valve by using a solenoid operated by a 24 volt transformer. The thermocouple calls the shots, and by converting heat to an electrical signal, it allows the gas valve to open or close. Once the gas valve is open, gas is then constantly supplied to the pilot and as required for the gas burners (as called for by the thermostat). If the pilot goes out, then the thermocouple gets cold and produces no electric signal to open the gas valve's solenoid and the gas valve shuts off the gas supply to the pilot and burners

May 27, 2009 | Endless Summer Blue Rhino 235000...

1 Answer

Heater won't stay lit


On your main gas manifold you have orfaces that screw into it at each burner. Remove these and see if their are small spider webs in them. They will look like little lint balls. They can keep your main burner from getting gas and in turn keep the heater from sensing flame. The pilot lights and the heater starts but no flame at the main will shut it rite down. See if this helps.

May 05, 2009 | Hayward H Series Millivolt 250,000 Btu...

1 Answer

Pilot goes out after heating cycle


Check regulator on the unit.
Check pilot unit on the heater
use soapy water to check for leaks if see bubbles turn off main gas supply valve.
always turn off gas supply before any checks or repairs are made
when all else failes call your local gas provider to check heater and gas supply

Nov 22, 2008 | Rinnai Desa Vent-Free Infrared Gas Heater:...

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