Orange range burner flame – what gives?


By Chris Dougherty

Chris Dougherty is a certified RV technician. Here is a letter he received from a reader while he was serving as’s technical editor.

Dear Chris,
The stove has always worked properly until we moved from NM to AZ this trip and put the kitchen slide out. We went to cook and the flame is orange/yellow. It has always been blue. My husband has changed hoses, regulator, changed tanks, tightened things down and checked the burners, which seem to be fine. We are lost! What do we try next? —Dee

Dear Dee,
burner flameSorry to hear about your stove problems. I am making an assumption that since you mentioned putting the slide out initiated the problem, that you have a kitchen slide, and the stove is in it.

If that is the case, then it points directly to the hose that is used to feed the gas to the slideout. The hoses, pipes, and wires run through a loop frame that moves with the slide. If the hose was kinking in one spot too much, it could eventually form a kink solid enough to inhibit proper gas flow.

Since your husband has changed a number of other components, and checked the burners, that helps narrow things down.

Replacing the regulator does not necessarily fix a pressure problem, as the regulators are adjustable, and must be adjusted when installed using a manometer, and adjusted to 11 inches of water column with a 50% load on the system. Any RV shop with Certified RV Technicians can do this test and adjustment for you.

In addition, the test can be done at both the regulator piping and at the range connection. This will help to narrow down where the problem is. If the hose for the slide is getting kinked, then it should be re-routed and possibly replaced.

If the gas supply to the range is good, then the problem rests within the stove. The stove does have its own step-down regulator which could cause an issue. Most newer cooktops have fixed fuel/air mixture, and since this is happening, I assume, on all the burners, then that probably isn’t the issue. If I had to put money on it, I’d say its a fuel supply issue first.

##rvt754 & RVDT1203

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11 months ago

What about an altitude change? Lower to higher or vice versa can have a similar effect.

Melvin Goddard
4 years ago

I noticed that Dee has moved from NM to AZ.
Is AZ higher than NM?
If so, the lower ‘density altitude’ could be the problem;
Too rich a mixture.Bruce;

Sink Jaxon
11 months ago
Reply to  Melvin Goddard

For the most part, NM is higher in elevation than AZ

Mel Goddard
4 years ago

Hey Chris;

A “Yellow Flame” means that the mixture is too rich; where-as your answers suggest fixes towards a too lean mixture.
In light of all the troubleshooting this fellow has done, I would suggest that the flame is being starved for air.

4 years ago

Actually the orange yellow flame is very common in AZ, it is caused by a lack of humidity. Once you leave AZ and go to somewhere there is normal humidity your flame will go back to blue.

Tommy Molnar
11 months ago
Reply to  Bruce

We live in Nevada and also have low humidity (15% as I type). We’ve never had any yellow flame issues, even when we travel down to Arizona.

Chuck Shepard
4 years ago

FYI, on a old dried black water an alternative is to fill it 1/2 way, drop in 2 qts of muratic acid, pool grade, and fill it to the top and even up to the flush valve, set a couple days, and drain, refill and dump in a small [1 cup] amount of RidEx for RV’s, or the old septic system, and let it set over the winter, the enzimes just do a great job of cleaning the system

11 months ago
Reply to  Chuck Shepard


I’d like to see a picture of your stove….