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

1 Answer

Pilot light keep going out will sometime stay on 3 hours then go

I have a continuous problem with my Coleman Evcon 7900 series.
The pilot light will light fine and the unit will work for a while then the
light goes out. A professional technician have replaced parts and cleaned out the pilot light debris. It worked fine for 8 hours and the pilot light went out again. The technician return and the same problem still
exist. What can be causing my pilot light to go out?

Email me at

Posted by on

  • 2 more comments 
  • violalynndav Nov 30, 2008

    To: Accurate Joe

    From: violalynndav

    The thermocoupler and flame sensor was replaced. Also, the pilot and oriface

    was cleaned. The heater pilot light stills goes out. I attempted to light the pilot and

    the flame went back out. I waited 5 minutes to relight the pilot and soon I entered

    pilot door with the match the flame busted out the door. I was very fortunate I was

    burnt on just my hand. I will call another technician in the morning.

    Accurate Joe what appear to be the problem with this pilot light.

  • Anonymous Feb 18, 2009

    Pilot light only stayed for 3 hours after it was lighted. New sensor has been installed, but it didn't fix the problem.

  • Joseph Lillie
    Joseph Lillie May 11, 2010

    A couple of things. Does this unit have thermocouple or flame sensor?

    What parts was changed.

  • Joseph Lillie
    Joseph Lillie May 11, 2010

    What parts have been replaced?


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 61 Answers

Great, if you are not skilled in working on this type of appliance the best thing you can do is to call a professional out. Be careful in picking a service company, there are a lot of dishonest people out there. Try to get a reference from somebody in the construction trade that you trust.

The Next question is do you have carbon monoxide detectors in your house?
Click the blue word Carbon monoxide site for more information. It could save you and your family's life.

If I can be of more assistance, please post back.
Do not hit accept if you can not leave 100% good feedback. Customer satisfaction is very important to me.
Thank You for your time.

Accurate Joe

Posted on Dec 01, 2008

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a coleman model 7680B series 856 with a pilot light that won't stay lit

You need a themocouple, it's a cheap $10.00 part you can get at any hardware store, you have a standing pilot light furnace like mine, if your handy and safe you can put one in easy, youtube is loaded with videos on how to do it. These other answers are wrong for your unit.

Oct 26, 2011 | Coleman Heaters

1 Answer

I have a few issues with an old probably dinosaur Coleman Presidential III 7995a-856 Heating unit. I've had 3 different repairmen look at it and they're clueless. The main pilot will light and stay lit...

if the pilot is clean and and strong then this should play on to the thermocouple , i take it you have changed the thermocouple , and the connection is good at the gas valve , then if this going out could be 1, powerunit on gas valve not holding at thermocouple connection

2. Hole in heatexchanger blowing out pilot when blower comes on

I take it the pilot stays on untill fan comes on and keeps going out , I would think about not putting any more money in to this and get new if sounds as the heater has had its day ,

Dec 17, 2010 | Coleman Heaters

1 Answer

Coleman Evcon AH Series heat pump and the status light blinks

NO you cannot. I also advise you to completely disconnect all power to it until ready to do the work, you may cause a fire otherwise. Be safe.

Feb 03, 2010 | Heaters

1 Answer

The pilot will not stay lit.

No, the pilot light fine now. It will just suddenly go out. It may be fine for 12 hours and in the middle of the night it goes out.

Dec 11, 2009 | Coleman (5040B750) Patio Heater

1 Answer

Coleman Gravity Floor Furnace need millivolt gas valve & pilot ki

Go to and look for a "power pile generator" this is a millivolt thermocouple that may be just what you need to make your heater work again

Nov 12, 2009 | Heaters

1 Answer

Green light stays on, red light blinks along with a buzzing noise

colman uses the furnace to power the attic vent fan . Cheaper that way I guess. It just supplies your attic fan with power so it will vent thus keeping your home a little cooler in the summer.
not a big deal. you can shut the alarm with a switch ot cut power to the alarm.

Apr 19, 2009 | Coleman Propane Forced Air Heater...

1 Answer

I have a coleman evcon and the gas keeps shutting off

The click noise you hear is the magnet inside the valve dropping out. Which means, the voltage that energizes it is low or interupted. Possible, weak pilot flame, bad thermocouple or bad secondary limit switch. This limit switch is located left of the main control. made of ceramic. It can also be a bad gas valve...

Mar 23, 2009 | Coleman Propane Forced Air Heater...

1 Answer

Furnace not cycling properly.

you might want to check the filter, if the filter is restricting the airflow the furnace will over heat and it will shut down. if you turn it off and on it will reset it and it will try again. Pull the filter out half way and try that, if it runs fine then clean the filter or get a less restrictive one.

Feb 06, 2009 | Coleman Propane Forced Air Heater...

1 Answer

Coleman furnace fan keeps turning off and on every 10 seconds...

clean your heat/flame sensor with sand paper or steal wool. If the sensor is dirty, it won't detect the heat from the flame and it shuts the gas off. Clean the soot and junk off the sensor and it should work fine. I have to clean mine every year. After spending hundreds of $$ every yr on tech calls..I figured out the problem and in 30 sec I'm up and running again.

Nov 10, 2008 | Heaters

Not finding what you are looking for?
Heaters Logo

241 people viewed this question

Ask a Question

Usually answered in minutes!

Top Coleman Heaters Experts


Level 3 Expert

1904 Answers

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Bill Long

Level 3 Expert

577 Answers

Are you a Coleman Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides