HVACopediaMajestic · Gas fireplace troubleshooting
Pilot and main burner go out while running
What is going on
Fireplace shuts down by itself during operation.
Likely causes
- Inner vent pipe leaking exhaust back into the system
- Horizontal vent pitched wrongly
- Vent cap installed wrongly or blocked
Check in this order
- Look for a flue leak and replace the bad pipe section
- Horizontal pipe must rise 1/4 in. per foot; never level or downward
- Check the vent cap installation and clear any debris
Applies to: DVBL7 series
More gas fireplace guides
Take it to the job
All guides, error codes and tips work offline in the HVACopedia app.
Source: Majestic DVBL7 Series Installation and Operating Instructions, p. 47. 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.