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Comfort Glow Vent-free Gas Heater CGN18B

I have a Comfort Glow Vent-free Gas Heater model number CGN18B. The pilot light will come on when i set the dial to "pilot". However when i turn it "high" the pilot light will go off. Any ideas?

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Re: Comfort Glow Vent-free Gas Heater CGN18B

Check with Ebay seller for available thermocouples. If that doesn't solve the problem the valve unit will likely need replaced.

Posted on Feb 13, 2009

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Re: Comfort Glow Vent-free Gas Heater CGN18B

The pilot light is operated off a millivolt generator. that is the small tube directly in the pilot flame. its purpose is to generate a small dc current which is connected to the pilot valve inside the main valve. setting the control to pilot opens just the pilot gas supply. when operating normally the millivolt generator keeps a small electromagnet pulled in that keeps the pilot gas supply open. if it don't work the pilot gas supply valve closes. replace the thermocouple.

Posted on Dec 07, 2007

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I have a comfort glow vent less wall heater that when the thermostat kicks the heat off, it makes a pop and the pilot light goes out

If the heater has not been serviced in the last 1 or 2 years then there could be an accumulation of lint, dust and debri in the burner and pilot assembly or the burner air mixture may need adjusting.
Have a service performed on the heater to have the lint, dust, and debri removed and also have the burner gas pressures checked and set to manufacturers recommendations.
It is also a good idea to have the unit serviced at least once every 2 years.

Dec 06, 2014 | Heaters

1 Answer


I would really like to help you determine what you have. However, the model number you listed is not a DESA model number. I think you may have listed the Serial Number instead. DESA/Vanguard/Comfort Glow wall heater model numbers start with 2 to 3 letters then 4 to 5 numbers.

However, to visually tell if it's Vent-free (Vent-less) look for a round hole for a vent pipe connection and/or look at the manufacture's data plate on the side or rear of the heater. It will tell you whether it's Vented or Vent-free. If it doesn't have a 3' round hole for a vent pipe, it's Vent-free.

Hope this helped you and thanks for choosing FixYa.

Sep 08, 2011 | Heaters

1 Answer

I bought a comfort glow vent-less space heater model # CJ18NL. It had a natural gas valve on it and the guy said I could put on a propane valve, which I did. It's not lighting. Is this model only good...

According to the Comfort Glow Website, this is a Natural Gas unit. If you use propane you will need
a minumum 100# LP Cylinder and a pressure regulator. I have a Comfort Glow unit and went through the same process.

If you have it hooked up to a 30lb cylinder without a regulator I would think that if you purged the gas line
of air you should be able to light the pilot.

On a new unit you can expect to push the spark ignitor button at least a dozen times while holding
down the gas valve button.

Good Luck

Feb 19, 2010 | Desa International GWP20T GLOWARM Wall...

1 Answer

My husband and I recently purchased a house that has a Comfort Glow Vent-free Propane/LP gas compact fireplace 14,000 to 26,000 BTU/Hr with Thermostat. Model CGCFTP We need to light the pilot light and it...

Remove the small copper colores tubing going from the gas valve to the pilot assembly. Take it to a good hardware store that sells heaters and ask them for a new one.It is called a thermocouple.

Nov 18, 2009 | Desa International Heaters

1 Answer

Wont stay lit

If the pilot flame does not touch the thermocouple, the heater will do exactly what you describe.

Get a short piece of copper tubing that will fit snugly over the thermocouple and bend the short piece so that it is in the pilot flame.

Jan 21, 2009 | Heaters

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Comfort Glow Vent-free Gas Heater

I have a comfort glow gas heater that the pilot lights and when I start the heater it works for about 30 seconds then the whole thing shuts down.

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Pilot light will not light

you should have to push the dial or a seperate button in to manually open the pilot gas valve. If you find this not to be true and you have a spark either the pilot burner assembly needs to be pulled and cleaned.

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1 Answer

Heater wont work on high setting

Clean the burner with a wire brush and vacuum the ceramic. Blow out the heater, remove dust, cobwebs, and lint from it.

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