Complete unit shutdown - natural vent / vent-free

What is going on

Unit shuts down; flame goes blue/ghostly before going out.

Likely causes

• Natural vent: venting outside spec
• Vent-free: catalytic door intakes blocked, loose connections, bad operator coil, pressure drop, room too small

Check in this order

1. If the flame does not go blue first, use the Pilot Failure guide.
2. Natural vent check venting against the installation manual and local code and correct.
3. Vent-free with catalytic door make sure its air intakes are not blocked or covered.
4. Vent-free clean/tighten thermopile, switch, remote and thermostat connections; test the operator coil.
5. Vent-free if the flame shrinks after lighting, check pressure drop on activation.
6. WARNING (vent-free) confirm the room volume meets combustion/ventilation air requirements; add room air or relocate.

More gas fireplace guides

• Blower noisy, vibrating or rattling
• Carbon / soot buildup (service flowchart)
• Carbon / soot on glass, logs or firebox
• Complete unit shutdown - direct vent
• Delayed ignition of main burner
• Exhaust fumes smelled in room / occupants get headaches