Furnace Pilot Light Goes Out Without Warning

Tools That May Help

Before calling a professional, these common tools may help you check the issue safely.

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Problem

Pilot shuts off suddenly without signs.

Common Symptoms

  • Weak airflow from vents
  • System running constantly
  • Uneven indoor temperatures
  • Higher energy bills

Possible Causes

  • Sudden failure
  • thermocouple issue
  • gas fluctuation

How To Fix It

  • Check system
  • inspect thermocouple
  • test gas

Safety Tip

Always shut off power to the HVAC system before inspecting wiring or internal components.

When To Call A Professional

If pilot fails unexpectedly, call a professional

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