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Pilot light on 1996 lp gas furnace burns yellow and makes terrible odor in building

Having a problem with the pilot burning very yellow and sutting badly also making a bad ododr in builing . trying to understand why it is sutting so. its new / pressure switch is new / valve is a new smart vavle/control board is new/ and limit swith is new. also having trouble with duct fan coming on to soon before plenium is heated

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  • Heating & Co... Master
  • 2,522 Answers

Pilot needs cleaning sounds like its blocked or change injector in pilot
try blowing out pilot out with air , check afc to see if it is dirty on the back side of it you should be able to remove it and see if it is clean ,also check air filter is clean.

Posted on Jan 07, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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Therinnaiguy
  • 1420 Answers

SOURCE: Goodman GMP075-3 ignition problem

OK, if the furnace is not lighting for even a few seconds, you have either a bad gas valve, bad wire, bad control module or no gas. The pressure switch is not the issue. Check all wires to the gas valve and look for 24 volts across them when the ignitor glows and you hear the click. Then test for 24 volts to ground. It could be a bad ground wire.

Posted on Oct 21, 2008

Accurate Joe
  • 61 Answers

SOURCE: Goodman GMP075-3 ignition problem

Test while the unit is firing with a meter. you should have 24 volts going to gas valve. If you do and no gas is coming out, you have a bad gas valve. You will need a gas pressure test kit to install a new one correctly.

Posted on Dec 01, 2008

  • 14 Answers

SOURCE: Fan switch will not make (limit switch).

If the snap switch is not located close enough to the plenum, this can be problem. The other option would be to cover the switch area with a metal shield or liatherm paper (fire rtardant paper).

Posted on Jan 29, 2008

  • 2522 Answers

SOURCE: Bad odor from vent free gas logs.

it could be leaking when the fire place is on you said you checked for leaks was this to the burner as well ? it sounds like unbrunt gas check the burner , hope this helps , are you feeling sick or headaches as this would b e fumes ?

Posted on Jan 14, 2009

heatman101
  • 43501 Answers

SOURCE: Coleman Gravity Floor Furnace need millivolt gas valve & pilot ki

Go to www.grainger.com 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

Posted on Nov 12, 2009

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1 Answer

My furnace keeps making an explosion when it ignites


The amount of gas buildup is too great. Make sure the burner ports are clear right next to the pilot light area. - run a small wire into the holes to make sure they are clear then make sure the pilot light is burning into the area next to the burner. A bit of whoosh is to be expected but if it becomes too great it will blow the pilot light out. Sears wall furnaces are prone to this the burners have to be kept clean

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Why is gas boiler burning black sut gas boiler when it lights up its makes a lot of black smoke and sut.


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Jan 25, 2014 | Honeywell Water Heaters

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Model# BWH30NLTB


Unit goes under sure heat name also.
My unit emitted unburnt gas smell the minute pilot started,
and was annoying during burner operation.
I discovered they built unit with primary pilot that had 2 ports.
They used LP and sealed off natural gas,instead turning lp/nat
knob on back activates second pilot for natural gas use.
This means natural gas goes thru LP pilot orifice and burns
slightly off during normal natural gas use(by design).
The unused natural gas orifice has 1 air mix hole and the LP orifice
has 2 air mix holes.
I carefully plugged 1 of the holes in the LP orifice and suddenly
pilot gas flame seated correctly on orifice port.Gone was the
unburnt odor of natural gas.
The typical flame in a flame appearance now was exhibited by
the small pilot,secondary pilot remained consistent with manual
picture.
Of course, to use with LP I would have to open blocked air mix
hole in addition to the other changes per manual.
Hope this helps someone with similar condition.

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Have it hooked to natral gas when it lights it will burn for about 20 seconds fully lit then gos out even blowing out pilot light


The most likely culprit would a faulty flame sensor and they are pretty easy to replaced. Get your model and serial as well as the make of your furnace. You should be able to locate a dealer in the yellow pages.

Dec 23, 2010 | Heating & Cooling

1 Answer

Pilot light flame is mostly yellow. LP gas


Hi,
Thr thing you need to do is take the pilot assembly all apart and blow the dust and dirt out of it.
After burning for many, many hours the air that is move up through the pilot assembly leaves dust and dirt which plugs off a bit of the air and makes the flame run rich. Meaning that it does not get enough air mixed in for complete combustion.
When you clean it you will see the dirt and dust com out of it.
Reassemble carefully just as you took it apart and it will be back to working great again!!

I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

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Flames burn then die down


it sounds like you may have a dirty pilot tube or a weak pressure regulator. I would try blowing out the pilot tube to make sure it is clear and if that does not work then replace the regulator.

Feb 14, 2009 | Dayton Gas Furnace Heater

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