HVACopedia

Napoleon · Gas fireplace troubleshooting

Main burner goes out and pilot goes out

What is going on

Both burner and pilot extinguish during operation. Check venting first, then follow the 'main burner goes out; pilot stays on' checks.

Likely causes

  • Blocked vent
  • Flue gases recirculating (poor joint seals / installation)
  • 4" flex vent disconnected from the fireplace

Check in this order

  1. Warning: treat as a venting fault - do not keep relighting until the vent is checked.
  2. Check the vent system for blockage.
  3. Check all vent joint seals and the installation for recirculation of exhaust into the intake.
  4. Make sure the 4" flexible vent is still attached to the fireplace; re-attach if disconnected.
  5. Then run the 'Main burner goes out; pilot stays on' checks.

Applies to: Napoleon GD70 STARfire direct-vent fireplace (GD70NT-S natural gas, GD70PT-S propane)

More gas fireplace guides

Related

Napoleon error codes · Calculators and reference tables

Take it to the job

All guides, error codes and tips work offline in the HVACopedia app.

Open the app

Source: Napoleon GD70NT-S / GD70PT-S Installation & Operating Instructions W415-0434, Troubleshooting table, p.26. Written in our own words; check the manual for your exact model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.