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

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Dont know what a combustion air switch looks like, where its located or how to fix one

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Mike Butler

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Can you give me your model number. Usually located on side of stack going up through, across from control box, and has a rubber vacuum line running to it. Need model number to confirm, and hopefully send you a picture of what to look for.

Posted on Jan 07, 2011

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1 Answer

What does a pressure switch look like ?


Generally above the burner assembly, there is the combustion fan motor and tied to this is a rubber hose. The rubber hose will lead you to the pressure switch. (It has 2 wires on it)

Dec 15, 2013 | Carrier 3 Ton 13 Seer Commercial Gas Pack...

1 Answer

Propane water heater high limit switch keeps kicking out


1) What brand and model water heater?
Copy following link for troubleshoot by type of gas control valve.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

2) Clean air intake screen using compressed air or feather duster.
With AO Smith, craftmaster, state, reliance, american, kenmore, whirlpool, the air intake is located on bottom of heater. Rheem, richmond, ruud, GE, Bradford white, the air intake screen is located under combustion parts.
Water heaters today require plenty of fresh air. If air intake gets clogged with dust, then combustion byproduct moves up pipe too slowly for amount of fuel being burned, and this overheats combustion chamber.
http://www.thetankatwaterheaterrescue.com/forums/forum3/

3) Add a comment with more information

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Dec 13, 2012 | Water Heaters

1 Answer

Rheem water heater 42vp40sf and the fvd interface failure code is flashing. how do i fix this?


Call Rheem
1-800-432-8373

TRD is flammable vapor system. Typically there is a glass bulb or fuse located in the combustion chamber.
See example image:
http://waterheatertimer.org/images/FV-TRD-glass-fuse-300.jpg

Remove the burner and look for the evidence of broken glass bulb that holds the air intake open.
Air intake is located bottom of combustion chamber, and bulb breaks causing metal plate to snap upwards and close off air supply to combustion chamber.
Rheem will have exact part number and possible instructions. Other people have wedged the air intake open to get system working again, but I do not know if that will work with your model water heater with electronic control. Working around the FV system exposes home and people to flammable vapor ignition and explosion when water heater is exposed to flammable vapors.
Example manual with illustrations.
http://waterheatertimer.org/pdf/Test-if-thermal-release-device-needs-replacement.pdf

Clean burner and pilot orifice and combustion chamber while burner parts are removed. Also clean air intake.
When burner is removed for cleaning, the access door gasket might need to be replaced.
Your product manual and/or Rheem will have that part number.

Sep 23, 2011 | Audiovox Richmond 6G40-36F 6-Year Tall Gas...

1 Answer

My statis code reads #33 which limit flame or roll out switch is open i dont know where to locate a roll out switch . i just never work on this heating unit


The flame rollout switch should be located in combustion chamber directly above the burners.Most of them have a red reset button in the center. Check to see if it will stay in when you push in on it. If not then replace it. Hope this helps you.Thank you.

Apr 16, 2011 | Carrier Heating & Cooling

2 Answers

I just had it installed and smell gas. if it says unvented , does it need vented or am i ok. im 73 yrs old and dont know much about gas heaters


An un-vented heater should never smell like raw gas, you may get an odor of combustion by-products but never raw gas. If you are getting the raw gas smell you either have a gas leak or incomplete combustion. Always follow manufacturers operation instructions that state "open window 1/4" to allow combustion air" If the unit is brand new, you will get an odor for 20 minutes or so of oils burning off of the heater but that smell should go away. Do you have a Carbon monoxide detector in the house? You should!

Feb 13, 2011 | Heating & Cooling

4 Answers

Evcon, 3 flashes, combustion air switrch failed to


I have 2 of these furnaces in mobile homes I own. On both of these the wheel inside the draft inducer blower that has the clear tube attached to it has a small wheel in it that over time tends to stick. Take the 4 screws out and give this little wheel located towards the bottom a push. Your problem may be solved without investing in expensive parts :)

Jan 26, 2010 | Coleman Propane Forced Air Heater...

1 Answer

Combustion blower turns on and never stops running


Sounds to me like the furnace isn't getting enough fresh air for combustion and the pressure switch isn't closing. try taking the cover off the burner assembly and c if that works

Mar 09, 2009 | Carrier Heating & Cooling

1 Answer

I have a coleman/evcon electric ignition lp furnace. I get error cede combustion air switch stuck closed even after replacing the combustion air switch.


Have you tried to replace pressure switch for the combustion air. If your not sure where to find it if you pull the front panels off follow the flue pipe down to combustion chamber the combustion fan motor is either inside the flue pipe or out side of it not sure on the one you have but you should see two plastic tubes that connect to a barb onto the topside of the fan and one on the bottom they both should go back to the pressure switch. i hope this helps you if you have any more question or if this doesnt fix the problem just reply back to this message . Make sure fan is working when furnace starts up. It should be the first thing that comes on when there is a call for heat

Jan 20, 2009 | Coleman Propane Forced Air Heater...

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