Question about Coleman (5040B750) Patio Heater

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My patio mushroom heater lights up ok but keeps going out by itself after about 5 to 10 minutes and then can be started again inatantainiously by starting pilot light and away you go until it goes out again.

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Hello,
Here's a few things to check. When you light the pilot, is it a strong blue pilot flame, a weak blue flame or a lazy yellow flame? Is it heating the thermocouple enough to make it red hot after a few minutes? If the pilot is small blue or lazy yellow flame, it may be dirty and need cleaned. When the burner lights, the weak pilot flame may diminish causing the thermocouple to cool off enough to shut down the main burner. Clean the dirty pilot orifice by using a can of compressed air with attached straw. (The same canned air you use to clean computer keyboards) Blow it into the pilot assembly where the pilot flame burns out from and blow thru the air holes on the side, if applicable. You might also check the thermocouple itself to make sure the tip is not partially burn't off. It should be a smooth, rounded tip. Replace the thermocouple if cleaning the pilot orifice doesn't solve the problem. Douglas

Posted on Aug 05, 2010

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1 Answer

Why won't my patio heater light


The thermocouple has to be in contact with the flame at all times when pilot is lit, this heats up and sends mill-volts back to the safety valve to keep the gas on, if not it won't let the gas through, otherwise you need to clean the pilot or replace the thermocouple if everything else is ok..

Aug 29, 2014 | Patio Heaters

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The patio heater starts fine and heats well. Then after about a half hour of use the flame will go out. It can be restarted and will heat again but the same thing will happen again, this time after about...


First thing to check is the fuel, if running on butane it will on cold nights slow down, pop and then go out. It will then run again when it's be left for a while. Butane works best on warm nights but for all year use switch to propane, this will work to -6 degrees. For information on fuel see different types of fuel. If that does not not fix it try this help pages patio heater top repair tips.

Jun 30, 2011 | Mr. Heater MH40PH Patio

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Portable patio heater is a DCS Phoenix Professional Patio Heater Model PHF8-DWBZ-L. Burner ignites and operates for a few minutes. Then teh flame is reduced to a short yellow flame. Regulator is covered...


The regulator covered with frost is the problem. It freezes the gas and the gas line up. But, usually this only occurs when it has been exposed to subfreezing (in the teens) temperature for a long period of time. The quick fix, is to soak a bath towel in hot water, ring it out and quickly wrap it around the regulator. Once it thaws, the gas will start flowing again and you can light the burner. Generally, once it's flowing and being used, it won't freeze up again, right a way. Most propane companies add ethanol to the propane in the winter, to help keep it from freezing in the lines and the regulator.

Hope this helped answer you question and provided, at least a quick fix solution.

Apr 21, 2011 | DCS PHFS Phoenix III Outdoor Patio Heater

1 Answer

I have a Charmglow patio heater. I have taken it apart and cleaned all openings where the gas comes out, but the flame still goes out after 7-8 minutes. It lights fine but will not stay lit for more than...


From what you have described, it sounds like the Thermocouple is going bad and needs to be replaced. As far as not being able to relight the pilot right away is concerned ... that's a safety feature. The control has to reset itself, before you can relight it, if the pilot goes out on it's on. As it did in your care. It usually takes about 2 - 3 minutes for the control valve to reset itself.

As far as replacing the Thermocouple is concerned, it's somewhat of a specialty item, because of it being in a tall patio heater. However, armed with the Model # of your Charmglow Patio Heater, you can probably purchase one from the manufacturer, Chamglow.

Hope this helps.

Feb 14, 2011 | Heating & Cooling

1 Answer

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Before you go changing parts, clean up the pilot assembly. When you heat metal and let it cool and heat it again it causes it to corrode. Also for some reason these areas seem to attract little spiders who make their homes here. This causes gas flow problems which in turn could affect the size and direction the pilot flame. For if it does not touch the thermocouple, thermopile or whatever that little thingy is called that tells the gas valve to allow the gas to flow...it will not tell the gas valvle to let it flow. Remove the corrosion, spiders, spider webs and any other insects then sand the thermocouple, thermopile or whatever that little thingy is with a rough sandpaper to remove corrosion. It will likely work after that.

I am very familiar with this heater, unfortunately. I posted the instructions on another problem with this same type heater to take it apart, clean and service it. That should be helpful.

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Returned it to Home Depot, paid $50 for upgrade to "better" unit.

Sep 28, 2008 | Coleman (5040B750) Patio Heater

1 Answer

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These heaters are not designed to be operated below 40 degrees F. If the heater is used below 40 and if you have a gas tank containing less than 25%, the unit will not operate for long and will start going out. If the heater all of a sudden goes out without showing any flickering or pulsations, you have a bad gas valve, there is no thermocouple on this model. Fill your tank and try the heater again. If it continues, give Coleman a call at 800-835-3278.

Nov 15, 2007 | Coleman (5040B750) Patio Heater

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