Question about Coleman 5040-751 BackHome Open Flame Patio Heater

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I have a Coleman 5040-751 Patio heater that seems to have a bad regulator, but I'm not sure. The flames come out so high that the top turned bright red. What parts should I be looking at? Or is there something else wrong with it?

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6ya6ya
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Posted on Jan 02, 2017

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Therinnaiguy
  • 1420 Answers

SOURCE: Coleman patio heater 5040A770

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.

Posted on Nov 15, 2007

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Therinnaiguy
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SOURCE: No Gas in Heating Element

If you are using the heater at temperatures below 40 degrees, ther will not be enough gas vapor to run the heater. If the temperature is above 40, look for an obstruction in the gas piping or gas valve itself. There is a small screen on the inlet side of the gas valve that you can inspect if you remove the inlet hose. Make sure you reinstall the hose using a teflon base pipe sealant on the threads.

Posted on Dec 19, 2007

  • 233 Answers

SOURCE: Coleman 5040 Patio Heater w/ Light - Light works, Heater does not

BE VERY CAREFUL sticking matches in any propane appliance! With the gas OFF see if you can physically see the spark when you push the ignitor, if yes, the problem may be the regulator or bottle pressure the only test i am aware of for the regulator is replacement.

Posted on Jul 14, 2009

atocrxr
  • 135 Answers

SOURCE: my coleman patio heater pilot lights but when I

Check the tip over senser,,, it is a plastic senser located under the screen, usually near the knob. It has 2 wires running to it, jumper them together and try it,, then order a new senser from the manufature.
Good Luck

Posted on Apr 04, 2010

wilsodfarm
  • 986 Answers

SOURCE: Model 5040-751 patio heater. Need to

marbeck will have them

Posted on Aug 15, 2010

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1 Answer

My 2 year old (rusted and looking like a 10 year old) Pilot goes on lights the heater, burns for about 2 minutes and goes out. I tried another regulator, same problem. Gas tank is full. The pilot light...


Heaters that have rusted are tin plated or chrome finish, it can be hard to get a stainless steel heaters since some traders sell heaters as stainless steel but don't tell you the burner is made of tin. If you get a new heater just ask the question, is the burner tin or stainless steel? The problem with a burner that goes out can be a simple as changing the thermocouple, these are consumable and last between 2 to 5 years depending on use and storage. But if you have a yellow tipping this is not good, this can be caused by wrong fuel mix or faulty gas valve and is not an easy fix. Found this site very useful patio heater problem solving. Lots of info.

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2 Answers

My coleman patio heater pilot lights but when I turn the knob to on position the flame goes out.


Check the tip over senser,,, it is a plastic senser located under the screen, usually near the knob. It has 2 wires running to it, jumper them together and try it,, then order a new senser from the manufature.
Good Luck

Apr 03, 2010 | Coleman (5040B750) Patio Heater

1 Answer

Charmglow Patio Heater


The yhernocoupler would snuff the pilot if bad. What ignites the overhead burners? and what regulates the overhead gas supply? Look into this. Too much gas will not light as easily as proper balance gas and air. Even more so in a tower type heater.. Turn the gas on low and the pilot should grab it. Good luck

Jun 05, 2009 | Coleman (5040B750) Patio Heater

1 Answer

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Your thermocoupler seems at fault. The thermocoupler is that probe that sits in the pilot flame. It controls the main fuel valve. Make sure that probe is in the pilot flame, better at the tip of the flame and hold the button down for a minute or so after lighting the pilot. If pilot extinguishes, the coupler is faulty. If pilot stays on the heater should fire up when you let up on the pilot button.. Good luck

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1 Answer

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This must be a top secret heater design. Coleman is dwfinately of no help. The whites go to the ignitors or the output of the spark generator. The black is generaly a ground. Good luck.

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you may need someone to come in and adjust your pressure regulator that is inline to heater this is what controls the output of propane and should only be adjusted by a pro

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1 Answer

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crappy pilot flame (not properly heating the thermocouple), bad thermocouple, thermocouple loose where it screws into the pilot safety valve, bad safety valve magnet.

One or more of those is the problem.

Oh...there is also a saftey switch...in case it tips over. It will also cause the pilot to not stay lit (if the switch or wires that go to i are faulty)

May 30, 2008 | Coleman (5040B750) Patio Heater

1 Answer

Coleman patio heater 5040A770


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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