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Furnace flame has alot of yellow - Heating & Cooling

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Yellow flame is an indication of poor air flow into or out of the unit/burners and can result in dangerous combustion gases forming - the safe thing to do is turn the unit off and call your gas supplier to evaluate the safety of the unit

Posted on May 03, 2008

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How do I get my furnace to stop smoking and make my burner flame turn blue


This is an oil heater with a wick, or an oil furnace?

Wick
If it smokes the wick is too high and the burner is not burning all the gases produced by the hot oil in the wick.

Use the wick trimming tool and then relight it. Light the wick and then lower the flame until it is blue.

Furnace
With a furnace, you need to open the front, clean out any soot and clean the spinner in the middle. You may need to regulate the air mix intake to get a blue flame. If it is yellow, you need more air.

If it's gas, you need an engineer.

Feb 01, 2016 | Heating & Cooling

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I have a Gibson gas furnace model gl1ra072c12a, the middle two burners flame are blue both end burners are yellow . All were cleaned. as well as jets what could be the problem?


If the flames are yellow AND lazy, not acting like the two blue flames are, the problem sounds like excess carbon build up within the heat exchanger ABOVE the two yellow burning burners. If that is the case, the yellow burning flames are contributing additionally to the carbon already in there. Eventually, the lazy flames will roll out into the furnace vistibule and possibly burn wiring creating a major problem. There are looooong wire handled bristle brushes 30" long that must be used to thoroughly clean the heat exchanger after the burners have been removed. A shop vac will help greatly in reducing the nasty carbon mess.

Usually, the vent collector hood and flue is removed to brush down from the top and up from the bottom alternately. If there are air shutters on the burners, make sure they haven't been throttled too far down limiting the combustion air causing the original problem.

You need a certified HVAC service tech to look at this issue.

Dec 09, 2014 | Heating & Cooling

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New furnace, Water In Induction Motor, Yellow Flame


The problem is too much gas as opposed to not enough air. It is still running rich. Did you take into account the elevation of the location your furnace is installed at. The higher above sea level the less air that you have to aid in cumbustion. The condensation is from excess gas being cold and causing water to accumulate. Can you run it like this? Yes but it will cause issues with soot and carbon deposits. It will also cost you more money in the long run.

Dec 23, 2013 | Goodman Manufacturing Goodman GCH950453BX...

1 Answer

Why does new furnance with propane conversion have yellow flames?


Make sure the kit included smaller sized orifice's and spring kit for the gas valve. The number on each orifice should be cross referenced with total btu's rating of the furnace. It does seem like there is too much fuel or not enough air intake (combustion air). The inches of W.C. seem fine, but you still may be getting too much volume of fuel with too large of sized orifice's. Hope that helps

Dec 20, 2013 | Heating & Cooling

1 Answer

Why is the burner flame yellow in my mobile home furnace


Yellow flame is lack of air Ie furnace needs a service

Mar 06, 2013 | Heating & Cooling

1 Answer

I have a Bryant furnace that is firing up then shutting right off.. The led is blinking green twice then yellow 4 times? What does this mean?


Hello, Make sure the flame sensor is clean near the burners, The flame sensor is a metal rod that is on the opposite side of the ignitor. To clean the flame sensor you will need some steel wool, turn off power to the furnace and remove the flame sensor and clean it with the steel wool. After cleaning reinstall it and turn power back on to furnace.

Feb 19, 2011 | Heating & Cooling

1 Answer

My coleman floor furnace will not stay on


Have the thermocouple replaced, ensure the pilot flame is blue - not yellow, yellow indicates blockage in pilot

Oct 08, 2009 | Heating & Cooling

1 Answer

Intertherm propane furnace makes popping sound when running


It sounds like you have a possible hole in the heat exchanger. Turn the heat off and turn the fan on. If you feel any air coming back out of the heat exchanger, you have a hole. A yellow flame is not a good sign. I would even consider having a service professional come out and take a look.

Apr 05, 2009 | Intertherm P3RA-048K Air Conditioner

2 Answers

Rheem criterion II flame stays lit for a few seconds then only cold air blows through the house


Your furnace needs a tune-up. MODERN FURNACES REQUIRE REGULAR MAINTENANCE!

Mar 10, 2009 | Goodman GMS90703BXA Heater

1 Answer

Weak flame in intertherm furnace


Ok, so we can rule out the ignitor. (standing pilot systems can develop problems that will cause such symptoms.)

Check the gas pressure, make sure you are getting 11 to 14 PSI.

You need that after the regulator all the way to the manifold.

Also check for cracks in the heat exchanger, causing the wind from the blower to distort the flame pattern enough to cause improper contact with the flame sensor.

Make sure the burners and flame channels are clean of rust, and dibri build up, allowing the flame to properly contact the sensors.

Jan 18, 2009 | Intertherm P3RA-048K Air Conditioner

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