Why does my gas fireplace have a weak flame?

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✅ Common Causes of a Weak Flame

  1. Dirty Burner or Pilot Assembly

    • Dust, soot, or spider webs in the burner ports or pilot orifice can restrict gas flow.

  2. Low Gas Pressure

    • Could be from the main gas line, regulator, or partially closed valve.

    • Propane users might just be running low on fuel.

  3. Clogged Venting or Airflow Issue

    • A blocked vent or restricted air intake reduces flame size.

    • Direct-vent fireplaces rely heavily on proper airflow.

  4. Faulty Thermopile or Thermocouple

    • If these sensors aren’t working properly, they may limit gas flow to the main burner.

  5. Dirty or Clouded Glass

    • Not directly a weak flame, but can make the flame appear smaller/dimmer.

  6. Improper Log Placement

    • Ceramic logs out of position can disrupt the flame pattern and make it look weak.

🔎 Quick Things to Check

  • Is the glass clean and sealed properly?

  • Is the gas valve fully open?

  • Are the logs positioned correctly (check the manual)?

  • Has the unit been serviced this season (burners cleaned, sensors checked)?

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