How to Adjust the Furnace Flame From Blue to Yellow

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When you turn on your furnace, the unit's pilot light ignites the main burners. The pilot lights on most home furnaces are calibrated before installation, but the flame can dim over time. If you notice that your furnace pilot light has turned blue, it is too dim. In these instances many people call a technician to adjust the flame, but you can adjust it yourself and turn the flame from blue to yellow.

Things You'll Need

  • Phillips screwdriver
  • Remove the screws holding the front panel of the furnace in place. Remove the front panel to gain access to the pilot light.

  • Locate the screw on the pilot light assembly. This is the flame adjustment screw.

  • Insert the tip of your Phillips screwdriver in the head of the screw, and turn it counterclockwise to increase the strength of the flame.

  • Adjust the flame until it is the ideal color. You can decrease the flame by turning the screw clockwise.

  • Replace the cover of the furnace and the cover screws.

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References

  • Photo Credit Thinkstock/Comstock/Getty Images
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