home+ — Homets Air and Heat
    24/7 Emergency(516) 259-1191
    Safety Concern

    Furnace Has a Yellow Flame?

    A yellow or orange flame indicates incomplete combustion—a potential carbon monoxide hazard that requires immediate attention.

    Get Immediate Help

    Carbon Monoxide Warning

    A yellow flame can indicate carbon monoxide production. If you also experience headaches, dizziness, or nausea, leave your home immediately and call 911. CO is colorless and odorless—a yellow flame is your visual warning sign.

    • Ensure you have working CO detectors
    • Open windows for ventilation
    • Schedule immediate professional inspection
    • Do not attempt DIY repairs

    What Causes a Yellow Flame

    Dirty Burners

    Urgent

    Dust and debris on burners disrupts proper gas-air mixture.

    Required: Professional burner cleaning required.

    Incorrect Gas Pressure

    Urgent

    Too much or too little gas affects combustion.

    Required: Professional gas pressure adjustment.

    Clogged Air Intake

    Urgent

    Insufficient air for complete combustion.

    Required: Professional inspection and cleaning of air intake.

    Cracked Heat Exchanger

    Critical

    Allows combustion gases to mix with household air.

    Required: Immediate professional inspection. May require furnace replacement.

    Improper Venting

    Urgent

    Exhaust not properly venting, affecting combustion.

    Required: Professional inspection of flue and venting system.

    Important Guidelines

    • Immediately—yellow flame is always a professional service issue
    • Never attempt to adjust burners yourself
    • If accompanied by any symptoms of CO exposure, call 911 first

    Diagnostic Visit — $199

    A licensed technician inspects your system, identifies the issue, and applies the $199 fee toward any approved repair.

    Licensed TechniciansSame-Day AvailableCredit Toward Repairs

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