Admiral Range Burner Yellow Flame: Adjusting the Air... | appliancefaults.com

Technical Background:

Gas range burners rely on a precise mixture of gas and air for efficient combustion. The air shutter controls the amount of air entering the burner, influencing the flame's color and intensity. A properly adjusted air shutter ensures the correct air/fuel ratio.

Symptoms:

The burner flame on your Admiral range is mostly yellow instead of a blue color. This indicates incomplete combustion, potentially leading to carbon monoxide production and inefficient heating.

Possible Causes:

Insufficient air intake due to a closed or misadjusted air shutter.
Dirty burner ports obstructing proper gas flow and air mixture.
Incorrect gas pressure supplied to the range.
Obstruction in the burner tube or venturi.
Spiders or insects nesting within the burner assembly.

Solution:

1

Turn off the gas supply to the range at the shut-off valve (usually located behind the range or in the basement/crawlspace).
2

Allow the burners to cool completely. Remove the burner grates and burner caps.
3

Locate the air shutter on the burner. It's typically a metal band with an adjustable opening near where the burner tube connects to the gas supply.
4

Loosen the screw that secures the air shutter. Some models may have a clip instead of a screw. You might need a 1/4-inch nut driver for this.
5

While the gas is OFF, use a small brush or vacuum cleaner to clean around the burner ports, removing any debris. Inspect the burner tube for obstructions.
6

Slightly open the air shutter and then turn the gas supply back on. Light the burner and observe the flame. It should be mostly blue with a crisp, defined cone. A yellow flame indicates insufficient air.
7

If the flame is still yellow, gradually open the air shutter more until the flame turns blue. Once a stable blue flame is achieved, tighten the air shutter screw or secure the clip to lock it in place.

Safety Warning:

Lock Out/Tag Out (LOTO) the breaker to the range before performing any electrical work. Natural gas is flammable and can be explosive. Ensure proper ventilation when working with gas appliances. Always turn off the gas supply before disassembling any gas components. If you smell gas, immediately evacuate the area and call your local gas company from a safe location.

Prevention:

Regularly clean the burner caps and burner assembly to prevent debris buildup. Check the air shutter for proper adjustment at least once a year.

Expert Tip:

Some newer ranges have electronic ignition systems. After adjusting the air shutter, the igniter may take a few attempts to light the burner. If the flame is too high even with the shutter fully closed, the manifold pressure may be too high and requires licensed technician adjustment.

Frequently Asked Questions

•How do I check the gas pressure to the range?

Gas pressure should be checked by a qualified technician using a manometer. Natural gas manifold pressure should be around 3.5 inches of water column (WC).

•What can cause a blue flame with yellow tips even after adjusting the air shutter?

Yellow tips on a blue flame can indicate minor impurities in the gas supply or slight drafts affecting the burner's combustion. Ensure the kitchen is well-ventilated and the burner area is free from strong drafts. Excessive yellow tipping may require further air shutter adjustment or burner cleaning.

•The air shutter screw is stripped, how do I adjust the air shutter?

If the air shutter screw is stripped, you might be able to use a screw extractor to remove it. If that fails, you may need to replace the entire burner assembly.

Admiral Range Burner Yellow Flame: Adjusting the Air Shutter

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I check the gas pressure to the range?

•What can cause a blue flame with yellow tips even after adjusting the air shutter?

•The air shutter screw is stripped, how do I adjust the air shutter?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: