20 Most Recent Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU) - Page 10 Questions & Answers

There is a fine balance between running rich (emitting soot) and running lean which produce carbon dioxide (CO).

The two items that can be lacking are air and circulation from the internal fan.

1)soot and dust can be collected on the internal fan blade.

This will reduce the ability to draw in air and offset the factory preset air mixture requirement.

Let the unit cool down and disconnect the power.

Clean the internal fan and let it dry

2) make sure there is no blockage to prevent air flow.

Crack a near by window open 1/4" and see does it make any different.

Coleman Propane... | Answered on Dec 04, 2009

Is your combustion air motor running? If the motor is running you may have restriction in the stack. Sometimes high winds will cause it to not make. Unplug furnace and plug back in. This resets the board. Turn on furnace and see if it fires up. Rus Get back to me and let me know.

Coleman Propane... | Answered on Nov 22, 2009

Look for signs of a cracked heat exchanger. Flame will turn real orange or yellow when the fan turns on.

Coleman Propane... | Answered on Nov 18, 2009

Stuck sequencer or fan relay most likely,unless you have the tstat set for manual.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Coleman Propane... | Answered on Nov 10, 2009

generally speaking a sealed combustion system is inherently more safe than a system that draws it's combustion air from it's ambient location. however, it cannot be considered 100% safe in a potentially hazardous location. The actual system that would be used in a "code compliant" installation would be a 100% outside air unit.
That being said, you can install this in a garage, the vent that you are referring to (if it is a standard mobile home system) is generally directly above the unit and usually no longer than about five feet. It also requires a listed and labeled termination "cap" If you install 90 degree angles or extend the vent too far you will have issues with condensation in the piping that will cause the pipe/ heat exchanger to fail prematurely.
If the system is a 90+ efficeint unit then the PVC venting is generally allowed to be about 30 feet long, with a 1/4 inch per foot pitch back to the unit for condensation, also the general mfg. instructions allow either 2- 90 degree or 4 45 degree fittings in the line. hope this helps

Coleman Propane... | Answered on Nov 07, 2009

You noted above it is a Coleman forced air Heater with a electronic ignition? You don't need a match to light the pilot, it lights automatic on a call for heat at the thermostat.If it does not light, then you have other problems. Let me know.
Good Luck,

Coleman Propane... | Answered on Nov 04, 2009

you have a bad ignitor or gas valve call your local heating repair company

Coleman Propane... | Answered on Nov 02, 2009

This is caused by the 'fan switch'. It normally holds the fan blower off until the heat builds up a bit, then it starts the blower. If the blower begins cycling, change the fan switch. It's located right on the side of the duct inside the furnace with the cover off.

This is what it looks like:


If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

Coleman Propane... | Answered on Oct 28, 2009

Need more info....describe the operation...what happens when it starts etc...it can be many things

Coleman Propane... | Answered on Oct 26, 2009

OK, the burners will need to have flame on the entire surface or it will trigger a sensor and shut-off. Get a brush and maybe even one of thoes can of air and blow off the burner. Stay away from the glow ignitor because that is very delicate. Once you get flame on all surface of the burners, the unit should stay lit.

Coleman Propane... | Answered on Oct 21, 2009

You have a bad Thermocouple or flame sensor

Coleman Propane... | Answered on Oct 14, 2009

In order for the furnace to light, a few things must happen. The thermostat must have a call for heat thus making a connection (closing a switch) sending a signal to a computer circuit board. The board will in turn blink a light indicating a call for heat is registered. It will then send power to a fan motor that will remove old air from the burner area and introduce fresh air to the burner. Once the blower comes up to speed, the pressure closes a a pressure switch. Once the switch closes, it sends power to an igniter, either a glow type or spark type. It also sends power to one side of the gas valve to open up the pilot gas valve and send gas to the pilot assembly. Once the computer senses there is heat at the pilot valve, it will open up the second gas valve and send gas to the main burner. The trick is to know where it is going wrong. First you must watch this sequence to follow the workings. To do this you may have to remove some panels on the furnace and hold a door switch closed temporarily to trick the furnace to run. Follow the sequence above to find where it ain't happening and look at what must be done to fix it. It could be as simple as a bad thermostat (no call for heat) or a plugged exhaust vent not allowing the pressure switch to close. Let us know how you make out with the diagnosis!

Coleman Propane... | Answered on Oct 13, 2009

i replaced the main board and the furnece worked good.
5 days and its out agin please help.

Coleman Propane... | Answered on Oct 12, 2009

If you mean hot surface ignition and not spark then look in front of the far burner from the glow plug and clean the rod in front of the burner with a piece of steel wool, the rod is probably dirty and can not sense the flame, so the gas shuts off.

Coleman Propane... | Answered on Oct 11, 2009

After you take off the front panel on the left side of the frunace you should see a black on /off switck
If that switch is on make sure that every light switch is on some times they youse this as a means of a dissconect switch

Coleman Propane... | Answered on Oct 10, 2009

NO, the regulator in the valve MUST be converted too!

Coleman Propane... | Answered on Oct 05, 2009

used a pair of pliers

Coleman Propane... | Answered on Oct 04, 2009

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