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Air is blowing out the pilot, gas wall heater

Gas wall heater, vents outside, air keeps coming into the unit and blowing out the flame, how do I keep the air from getting into the unit

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  • jayharmon2 Dec 12, 2009

    its a brand new unit, it vents outside, but air is coming in through the outside vent duct, and blowing out the pilot, why is that happening

  • Leroy Elliott
    Leroy Elliott May 11, 2010

    You are flirting with danger, this is 2009, replace it with an elecric unit



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Look in your yellow pages and call in a GAS FITTER to look at the unit.

Posted on Dec 12, 2009


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Can't light pilot due to breeze coming out of unplugged gas wall heater

It sounds like you have a direct vent heater so you have to take off a pilot access cover to light the pilot. So what happens is the draft coming out of the cover is blowing out the match before you get it in the hole. The trick is to get the match or lighter in the hole quickly as possible so the pressure inside the heater will equalize and the match will stay lit. Then you should be able to lite it. Get it inside the hole fast and it will work. Don't forget to put the cover back over the pilot access or the draft may cause the pilot to go back out.

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I can"t keep my pilot light going.

I am assuming this is a patio heater. I have extensive experience with gas appliances. The most common problem with pilot light issues is the thermocouple it is a probe that is directly over the flame , it senses the flame and allows gas to flow, if it senses no flame the gas valve closes. Patio heaters are also quite finicky, sometimes a simple adjustment of the thermocouple will do the trick. Also thorough cleaning of the orifice is necessary at least 1 x a year.

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Rheem 22V50F1 pilot won't stay lit. Changed thermo couple & it lit, ran then went out. Let it sit overnight & it lit, ran then went out. What next? p.s. The unit is 5 years old. Thanks

If pilot lights and flame is robust and clear blue, and pilot goes out later, then some suspects can be excluded: air in gas line, low gas pressure, thermocouple is overtightened (finger-tight + 1/4 turn), thermocouple not positioned correctly in the flame, dirty pilot tube.
If flame is yellowish and small: then clean pilot tube and combustion parts.
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Charmglow CGL300TQ Keep shutting off after a minute???

Not too familiar with this product, but it looks like a vent free heater. ALL vent free heaters are required to have an ODS pilot light. These pilots monitor the oxygen level in the room and if it detects a low oxygen level, it shuts down the whole heater. This is what I think is really happening. And the solution is simple. Near the rear of the metal tube where the pilot light flame comes out, you will find two very small holes. If these holes get even a little plugged up with dust you will have this problem. Just get a can of air or use an air compressor and blow air through these holes. I bet that this will solve your problem. It is also a good idea to keep the area around your heater clean and free of dust. I have a free standing gas log heater and at the start of each season I take the logs out and vacuum everything, inside and out, and also underneath the unit. Then I use my air compressor to blow out any remaining dust, especially around the pilot light, and of course, I then blow air through the two tiny holes in the pilot light tube. Since I started doing this, I have not had any problems with my heater.

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1 Answer

When I light the pilot light, the heater comes on, but when it reaches a certain temperature and turns off, the pilot light goes out. Please explain very simply, I am not mechanical.

It could be a number of problems, so let's start with the easiest! When you light the pilot, is the pilot flame a strong blue color or a lazy yellow color? If it's yellow, it may not be heating the thermocouple sufficiently to keep it lit after the burners reaches temperature, so it shuts off with the burner. The solution is to clean the dirty pilot orifice using a can of compressed air with the straw attached (the kind you use to clean computer keyboards) With the heater pilot turned off, blow air down the flange where the pilot flame burns. If it has an air hole on the side of the pilot assembly, blow air through that too. Then relight it and if you have a blue pilot flame, see if that solves your problem and stays lit through the entire cycle. If not, go to the next problem:

You may have a dirty flame sensor bar. if your heater is so equipped, there is an small "L" shaped bar that protrudes near the end of one burner and senses the burner flame. carefully clean it using a small piece of sandpaper, being careful not to put too much pressure on it which might break the porcelain piece on the other end. Then wipe it clean with a dry cloth or paper towel and try lighting it again and see what happens. If that doesn't fix it, then try this:

It is also possible you have a defective thermocouple. Typically when they go bad, they won't stay lit at all, but sometimes they do light and go out later. Solution: Replace the thermocouple. It is the skinny metal bar that the pilot flame is heating. It is screwed into the gas control on the other end. Make sure it is cooled down before pulling it out of the pilot assembly. Don't worry, it doesn't have gas coming out of it and there is no electricity connected to it. Remove it and measure it and take it with you to the nearest hardware store or do-it-yourself center and they will match one up for you.

Other possible problems could be a strong draft blowing in the vent and blowing out your pilot, so make sure you have a vent cap outside. Or it could also be a blocked outside vent that is causing it to shut down, so check for blockage via a bird nest, dead bird, wasp nest, etc. Hope these help!

Let me know if you need more info or if one of these works for you! Douglas

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1 Answer

Fireplace will start but shuts off in about 30 seconds

Here's a few things to look for. After you light the pilot and turn on the burner, look at the pilot flame. Is it still a strong blue flame and it is still heating the thermocouple? If the pilot flame is a lazy yellow, it may not be able to keep a good enough flame on the thermocouple to keep it hot. The solution? Turn it all off and let it cool down. Take a can of compressed air, like you use to clean computer keyboards, and using the attached straw, blow out the dust or spider web that's partially blocking your pilot orifice. Where the pilot flame is usually lit, blow right down that flange, as well as through the air hole that is on the side of the pilot assembly. If you do it right, the pilot flame should be a nice and strong blue color. Another thought. Is this a vented or unvented fireplace? If it's vented, make sure it has the oxygen it needs to burn by checking for blocked vents or opening a closed fireplace fume above it.

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1 Answer

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Most common cause of pilot light problems is air movement. If your space heater exhausts gas through the roof, ensure the cap is on and level. If not, outside air movement will blow out the pilot. If you do not have an exhaust gas duct, check that the unit is positioned so that it does not blow air back onto itself from walls, furniture, etc, and ensure no other devices that move air are aimed towards the unit. The unit also needs to be placed away from central ducting, including return vents.

Hope this helps!

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I would look closely at pilot flame, if flame is lazy and yellow,repace the OD S pilot assembly.You can order from 1-800-654-8534

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1 Answer

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Intermittant flame, ignitor function is good, all other functions are as designed,timer ,tumble etc.


The pilot light flame would sometimes get very small and keep going out. This was usually because the pilot orifice was getting dirty and was partly plugged. The pilot orifice must be cleaned out when the flame becomes too small to light the main burner. You can blow air through the pilot assembly to help clean it out, don't use something metal in the pilot orifice hole or you risk enlarging the pilot gas feed hole and the pilot light may be too BIG. If your pilot flame keeps "going out", chances are you will need to replace the pilot latch do make sure the vent hood flapper is closing ok and no outside air blowing in is effecting the pilot flame.
This is a thermocouple that sensed the heat from the pilot flame and kept a small amount of gas flowing to allow the pilot light to stay lit. If you followed the instructions ( usually found inside the small access door on the front bottom ) on how to re-lite your pilot when it goes out and the flame will not stay on, replace the pilot latch assembly.

Please accept the solution and revert for further assistance.


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