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My propane gas water heater. (40 gal) Reliance, has a yellow flame.

Customer Question
The flame is large when...
The flame is large when it lights, and yellow. It seems wrong?
Submitted: 8 years ago.Category: Plumbing
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Answered in 23 minutes by:
2/1/2009
Plumber: The Home Smithy, Tradesman replied 8 years ago
The Home Smithy
The Home Smithy, Tradesman
Category: Plumbing
Satisfied Customers: 9,623
Experience: Tradesman
Verified

HiCustomer

You are correct. A yellow flame indicates an excessive amount of fuel is being allowed to escape from the gas nib (commonly called a gas jet). As these units usually do not have an adjustment for the pilot flame size it is the job of the nib to restrict the gas to the proper amount. If during a cleaning the nib it poked with a wire brush it opens it too much and this results in a large yellow flame. Other than that the nib may need to be changed out if the unit has been converted to LPG from LNG.

If your concern is the main burner flame then it is not getting enough air and needs to have the air adjust slider moved to allow more air to be mixed with the fuel. This is accomplished by finding the mix window and moving it further open. This will be a small piece of metal that is secured to the main gas inlet tube going from the gas valve to the main burner. It will be secured by a single screw. Loosen that screw and open the gap wider untill you get a flame that is blue at the base with just a tiny tip of yellow at the top.

 

Please post any other concerns you may have here.

Best regards, XXXXX XXXXX Smithy

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Customer reply replied 8 years ago
Thanks:
It appears that the flame is coming from the end of the supply tube (at the base of the burner) when it lights, rather than a burner itself. If I had a diagram i should show it exactly
Plumber: The Home Smithy, Tradesman replied 8 years ago

Oh I see That doesnt sound good at all.

Here is a basic diagram. Are you saying the flames are coming out like the red in the drawing?

graphic

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Customer reply replied 8 years ago
Yes absolutely right..
I guess I need help huh?
Do you expect it requires a whole new heater or can the burner be replaced cost effectively.
The heater has a date of 2002.
Thanks
Plumber: The Home Smithy, Tradesman replied 8 years ago

I would think that the burner has just been bumped, and is not aligned properly, or something is blocking the gas from entering the burner. If you can, reach into the top of the burner and see if something is blocking the gas from up top. Wear some surgeons type gloves as it is very possible that the problem is a large bug or small rodent. If your squeemish about such things then see if there is a handyperson, or maybe a college age kid in your neighborhood that can have a look at this for you. Im sure it is only a matter of a simple blockage. That is about the only thing that would cause this situation to occure in a short time frame.

 

Let me know if you need further assistance.

Best THS.

The Home Smithy
The Home Smithy, Tradesman
Category: Plumbing
Satisfied Customers: 9,623
Experience: Tradesman
Verified
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Customer reply replied 8 years ago
Thank you so much .....problem solved.
have to run out now but will conclude this later or tomorrow.
Thanks
Plumber: The Home Smithy, Tradesman replied 8 years ago

Ok, thats great.

If my answers were helpfull please be sure to click on the accept link. That is the only way that I will be paid for my services.

Thank you

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The Home Smithy
The Home Smithy
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Satisfied Customers: 9,623
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