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

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Heter goin off and on

The flame will come on for 2 to 3 minutes and then turns off

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Sounds like the thermastat may need replaced
Hopes this helps!

Posted on Dec 15, 2008

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Hi there, the unit turns on and sounds normal, but is blowing cold air. i'm looking into the unit but can't see a flame, are u supposed to? should i ignite by hand?


Yes, if you open the top door you should see a pilot light. If you don't then the first thing is, do you have gas? If you do then there should be specific instructions on how to light it, on the door. Just to give you an idea first find gas valve, its the thing connected to the black pipe leading out of the furnace. Then find the aluminum tube that comes out of it (1/4" tube, silver, small) and trace it to the end, this is where you will light the flame. Then turn the gas valve to off position for 2-3 minutes to let any gas dissipate. After that turn it to pilot, push and hold the red button, then light the flame. once the flame is lit turn gas valve to on position. If the flame does not stay lit then you have a problem with your thermocouple (senses flame). If the pilot light does not light at all you either have no gas or there is air in the pipes.
Hope this helps.

Feb 10, 2011 | Goodman GMS90703BXA Heater

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

My Rheem Ruud 25M01A water heater flame goes out before the thermostat is satisfied. The igniter goes into a ignition sequence from here on trying to get the flame to ignite for ever. If i turn the unit...


Check the air lines going to air pressure switch for cracks or splits. I know that will affect the gas valve but not sure if that is your problem.

May 07, 2010 | Heaters

1 Answer

Heter trys to ignite,replaced igniter,cleaned fuel filter


1. Check the ignition transformer. It may be grounded,
or it could be defective, and need to be replaced.
2. You have already replace the igniter and the
photoeye.
3. Once the ignition transformer works, everything will
be alright.
May this tip help you.

Jan 04, 2010 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

When you let off the ignition button the flame


turn off main valve for 5 minutes. Re-open and attempt ignition again. you have a vapor/air lock. good luck

Dec 08, 2009 | Dyna-Glo Heaters

1 Answer

Weatherking furnace is starting and stopping


This just sounds like a couple of problems. First, your blower is designed to only turn on once the heat exchanger heats up, so the flame will be on for a minute or two before the blower starts. it sounds like your blower is cooling down the heat exchanger too fast and causing it to shut off so it can warm up again...check blower speed for heat, it should be the lowest speed (black wire). Blue=medium speed, red= high speed. second problem could be your flame sensor rod is calcified, you just need to locate this and clean it off with some fine sand paper.it is located in the flames near the burners. Also change your filters, for proper air flow through your heat exchanger.

Oct 28, 2009 | Heaters

1 Answer

Rudd Gas Furnice will not stay lite. I have tried by passing the thermostat and it still goes the same thing. I will run for about 30 seconds then shuts off the gas. It will relite after about 2 minutes...


This usually caused by a dirty flame sensor. This is typically a small round rod with a ceramic base. the rod will be mounted directly in front of one of the burners with the rod in the flame. To clean it....
  1. Turn off power to the furnace.
  2. Remove the flame sensor.
  3. Clean the rod with steel wool ( never use sandpaper! )
  4. Remount the sensor.
  5. Turn the power back on.
  6. Check operation of furnace.
This is usually all it takes to fix it.

Oct 18, 2009 | Heaters

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