Question about Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU)

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Pilot and Burner shut off at same time at various run times.

After lighting pilot and engaging burner, both will shut off at same time. Some time the house will be heated for only 5 min, sometimes an hour. Pilot relights without problems, blower kicks on shortly after burner heats up unit. Everything seems to be in good working order. I took the blower motor out and cleaned the wheel cage and motor, checked all wiring for loose connections. I am stumped and getting tired of moving space heater room to room. Please help, I have a pet rabbit and i cannot use space heater near him for fear of injuries.Thanks.

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Sounds like your pilot saftey is working.the pilot flame heats a device called a thermacoupler which gives a signal to the gas valve letting it know its ok to open main valve. you may need a new thermacouple , might have a dirty pilot orfice or a problem with gas pressure or worse case a cracked heat exchanger in any case in less you have some type of training you should call a pro

Posted on Feb 05, 2009

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Posted on Jan 02, 2017

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Any idea why my Atwood water heater will shut the main burner and the pilot light off at the same time? Sometimes runs for 20 minutes, sometimes 2. I hear a clicking sound, then they both shut off.


The thermostat shuts off the main burner.The pilot light gas is controlled by the thermocouple which the side of the pilot flame has to envelop. If the flame is too small or too far away from the flame, it shuts the gas off to the pilot. The thermocouple generates a small voltage which keeps the pilot gas open. It can over time fail itself, so look at replacing it. The thermostat sounds like it's failing too.

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Why does burners and pilot forced off after burners are engaged


We get asked this question many times.

If you light your pilot light, hold in the button and then when you release it and the pilot light goes out, generally you need a new thermocouple. Gas repairs can only be undertaken by a qualified gas technician so you can't do this job yourself.

The thermocouple is a safety device that recognises that the pilot has a good flame and is enough to ignite the main burners. The thermocouple open that valve to the burner.

In limited circumstances the thermocouple doesn't need replacing, either the shield that aims the flame to the thermocouple has become dislodged, or the pilot jet is a little blocked by debris. Either way, having the appliance serviced by a qualified gas fitter is the way to go. I am sure you will have seen news stories about explosions caused by gas leaks and faulty appliances.

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1 Answer

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For (fire) safety, there is usually a thermostat that will turn off the gas if pilot light goes out.

So when you try to light the pilot you will have keep press & hold the pilot gas supply for at least 10 sec until the thermostat is heated up. Then only when the pilot light stays on continually, can you turn on the burner.

Forget about changing to a High pressure regulator!

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1 Answer

Small Pilot flame on MrHeater MHBF20lpt & pilot won't stay on.


You will probably need to remove the pilot orifice and clean it out use a small needle or orifice cleaning rod. The pilot flame is not big enough to keep the thermocouple engaged.

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I have a PROCOM model ML300TBA, two years old. Here is my problem: Pilot lights fine. Burner lights fine. When I go back the next morning, often times it is out. Burner and pilot are out. It will...


You could try cleaning up the thermocouple with steel wool. Some manufacturers call this a flame generator as well. Any how make sure it is clean and positioned in the top center of the pilot light for best signal. This is only speculation as these are common problems that will arise on heaters in general. This also turns the gas to the burners and pilot light so thats why to start here first. Hope this helps you out.

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William forshaire 435 runs well for awhile until


Try cleaning your thermocouple,and resetting it where was, which is located at the pilot flame. this should solve your problem.

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1 Answer

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Need to check the vent tube for restrictions
and check to see if the blower motor air is not blowing out the pilot if it is the blower motor air blowing out the pilot nthe the heat exchanger may be cracked and could be dangers

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it's the thermocoupler ( about $20 ) that is bad replace it. if that doesnt do it it is the box with the on/off/ pilot button ( about $175 ) I found a complete unit at www.americanrvcompany.com for $275 plus shipping ($300 total) and that is how i fixed the exact problem with mine.

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1 Answer

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Set t/stat to 250 degrees. If it does not shut off after about 5 minutes, replace t/stat.If shuts off, must be calibrated Pilot may be dirty, flame weak. If flame strong, replace thermopile(pilot generator). If weak, must remove and clean pilot orifice inside pilot.

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