Napoleon Gas Fireplace: Main burner flame is blue, lazy and transparent
Main burner flame is blue, lazy and transparent on a Napoleon gas fireplace: Flame looks ghostly blue and see-through - a sign the burner is starved of combustion air / flue gases are recirculating.
Applies to: Napoleon GD70 STARfire direct-vent fireplace (GD70NT-S natural gas, GD70PT-S propane)
Common causes of main burner flame is blue, lazy and transparent
- Blocked vent or terminal (including ice on the terminal in very cold weather)
- Incorrect vent installation - storm collars in the wrong place
How to fix main burner flame is blue, lazy and transparent: step by step
- WARNING: a ghostly blue flame means poor venting - shut the unit down until the vent is cleared.
- Inspect the vent and termination and remove any blockage.
- In very cold weather check for ice on the terminal and remove it as needed.
- Check storm collar location against the installation manual diagram (Figure 13) and correct it.
If the unit shows an error code, look it up: Napoleon Gas Fireplace codes
Models
Source: Napoleon GD70NT-S / GD70PT-S Installation & Operating Instructions W415-0434, Troubleshooting table, p.25. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.