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Home gas heater

How to lite a gas heater

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Need more info. Does it have a pilot light? Some are spark ignition and some hot surface which both light themselves, except for pilot style.

Posted on Nov 08, 2007


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Posted on Jan 02, 2017


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Not light

check to make sure that the poilet lite flame is touching the tip or top of the thermocouple.
the pilot lite needs to heat up the thermocouple so that the thermocouple opens the gas to the main gas log. a cold thermocouple shuts off the gas to the main gas log or gas burner and a hot thermocouple opens the gas to the main burner.
the pilot lite flame must be touching the thermocouple to heat it up.
pilot lite orface needs to be clear to let the pilot flame gas through with enough pressure so that the little flame can reach & touch the thermocouple. Pilot lite gas feed tube must be clear to let gas through. Use compressed air or a fine sewing needle, or even carb cleaner to clear out orface hole and gas feed line to pilot lite.

important!! WARNING:
if you use carb cleaner,make sure all the carb cleaner is dry,soaked up with paper towell or kleanex tissue and blowed out with compressed air , because carb cleaner can burn just like gasoline; so any carb cleaner must be compleatly gone before you attempt to lite the pilot lite.

May 20, 2013 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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I have a desa gas log heater when the heater lites and goes out the pilot lite goes out also

I would start with cleaning the Pilot ODS Assembly and also reseating the thermocouple.

Here is a link to cleaning instructions.

Oct 08, 2012 | Desa International Unvented Gas Space...

2 Answers

Why does pilot light turns on gas burner only to have it go out about 10 seconds later? 30 to 40 sec later repeats,without lighting. What is problem? once in awhile, it will light..not often. The burner...

Sounds like the thermocouple is going bad.The thermocouple is a thin tube that runs from the pilot lite to the gas valve.
What it does is it sences the heat from the pilot lite and keeps the gas valve open to allow the pilot to stay on.
This can be easily repaird by shutting off power and gas to your heater and removeing the thermocouple from the gas valve,then unclip or unscrew it from the pilot lite area.
Any plumbing supply store or home depot or lowes should have these.

Once you get a new one,install to gas valve and pilot lite area then turn on power and gas to heater and follow pilot lighting procedure,you may need to hold gas on for 60 seconds.

Here is a picture of the thermocouple so you know what to look for.

Feb 10, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

Cannot get pilot to ignite. have repeated steps as instucted with no help

possible you have a bad thermocoupler this is the rod that is next to where you are trying to senses flame and after getting hot will send current back to gas valve to keep pilot lite. home depot sells thermocouplers very cheap in water heater department it will work for your heating unit also....

Dec 31, 2010 | Endless Summer Heating & Cooling

1 Answer

Hi! I moved into a bank owned home with a hot tub that has a gas LAARS LITE 2 Teledyne heater. It is not working, so I had someone come out and check it. He said I need to purchase a pilot assembly before...

Go to and download a manual for your model. Get the model number from the heater, and look up a manual. If yours is a milivolt model, the pilot must be working to troubleshoot further. The manuals will be full of information.

Oct 01, 2010 | Teledyne Laars Laars Lite 2 Pool Heater...

2 Answers

Laars Lite 2 Coversion to LP Gas

Hi you will need a gas fitter to do this and set it up

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

1 Answer

Switching from natural gas to lp gas

Get in contact with the appliance manfacter, ask them for a conversion kit and if it can be done they will send you out all you need. Obviously there will be a charge.

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

1 Answer

Switching from natural gas to lp gas

yes, have a qualified technician do the conversion. You will need to order the conversion kit. It is listed in the back of the installation manual (available on-line).

Dec 05, 2008 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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Laars Lite heater not working

1st time this happened to me the filter wasn't clean. 2nd time it was the pressure switch and for the third time they say I have to bleed the gas line, not enough gas to lite. And I also need the on/off switch gone bad.

Jun 08, 2008 | Lite On Laars Lite 2 Heaters: 250,000BTU...

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