Why does my fireplace keep shutting off?

/ Gas Inserts, Gas Logs, Uncategorized / By

  1. Dirty Pilot Light or Burner

    • Dust, soot, or debris around the pilot assembly can cause a weak flame that won’t stay lit.

    • If the flame isn’t strong enough to touch the thermocouple/thermopile, the system shuts off.

  2. Faulty Thermocouple or Thermopile

    • These safety devices sense the pilot flame.

    • If they’re dirty, worn out, or failing, they stop sending the signal to keep gas flowing.

  3. Overheating or Blocked Venting

    • Poor ventilation or a clogged vent can cause the fireplace to overheat, triggering the safety shut-off.

    • Some direct-vent units have limit switches that trip if airflow is restricted.

  4. Gas Supply Issues

    • Low gas pressure, a partially closed valve, or problems with the gas regulator can cause the flame to go out.

  5. Faulty Safety Switch or Sensor

    • Modern units have oxygen-depletion sensors or high-limit switches.

    • If they detect an unsafe condition (or fail), the unit shuts down.

  6. Electrical / Control Issues

    • Bad wiring, failing remotes, or weak receiver batteries can interrupt the signal, causing shutdown.

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