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Why Is My Pilot Light Yellow Instead of Blue?

Several furnace questions are common among homeowners. A yellow pilot light is a topic that comes up frequently. It’s important for homeowners to know why this happens and what they should do if this occurs. Following is a step-by-step FAQ to take you through this process. As always, if you have any additional questions or concerns, you can contact your HVAC contractor in Albany, OR for professional assistance.

What color should the pilot light be?

A healthy pilot light should shine a deep blue. This is the color of a strong flame that is receiving plenty of oxygen to burn properly.

Why is the pilot light yellow?

If the oxygen to your pilot light is restricted, the flame turns yellow. This indicates it is no longer receiving an adequate oxygen supply. This is commonly caused by a clogged air intake valve. Over time, dirt and debris can accumulate on the valve and restrict the airflow. If the air is blocked, the flame turns yellow. A partial blockage can cause yellowing at the tip of the flame. A larger blockage causes the entire flame to burn yellow.

What happens when the pilot light isn’t blue?

Two things happen when your pilot light burns yellow instead of blue. First, it will go out frequently. Since yellow flames don’t burn as hot as blue, a yellow flame doesn’t adequately heat the thermocouple. As a result, the gas supply shuts off, and you’ll have to relight the pilot light. Secondly, the yellow-burning pilot light allows carbon monoxide to enter your home’s air. The yellow flame isn’t strong enough to completely burn the carbon monoxide, so the gas can escape into your home.

How can you prevent your pilot light from turning yellow?

Regular maintenance is essential to healthy furnace operation. It keeps things running optimally and extends the longevity of your system. To avoid clogged valves and the resulting yellow flames, have your system serviced each fall and spring. This will prevent more extensive repairs for this issue as well as other potential problems with your furnace.

What should I do if the pilot light is yellow?

If you notice that your pilot light is yellow instead of blue, it’s time to call an HVAC contractor in Albany, OR. The air intake valve needs to be cleaned, and this should only be completed by a professional. It’s essential to access and repair the part properly to ensure safety and maintain healthy operation of your furnace. Contact your trusted local service to complete the repair.

If you discover a yellow flame on your pilot light, don’t hesitate to contact the pros at Larsell Mechanical Service. With extensive expertise, we have the knowledge and skills required to properly diagnose the issue and make the necessary repairs. A yellow flame will only worsen over time and go out more frequently as the oxygen level continues to deplete. If not repaired, it can also pose a health hazard as carbon monoxide levels increase. Contact our professionals today for top-rated service that will restore your furnace to good shape in no time.