Gas Fireplace Flameout

Among the possibilities:

• Pilot gas flow too low
• Pilot burner sensor incorrectly adjusted or faulty
• Too draughty near pilot burner
• Mismatch between gas Wobbe Number and the installation hardware

Thanks. Could be the pilot sensor. Looks like the flame contact with it is a bit anemic.

Is this a new unit? If yes verify correct pilot burner orifice was installed. LPG orifice is smaller than natural gas orifice. If unit is existing and was shut down for a period check burner for insect such as spider and evict the resident and any webbing. Also verify orifice is clear (do not enlarge opening). Also make sure all supply valves are fully open.

In addition to the pilot sensor, there may also be a flame sensor that is in contact with the flame near the furthest point from the pilot. It's also designed to close the gas valve in the event of a flameout. The surface of both sensors tend to develop a white residue or otherwise become contaminated. Light abrasive cleaning with fine steel wool will usually remove that surface contamination.

Is pilot flame strong blue or a lazy orange? Orangish indicated it needs cleaning

I had a similar incident this past winter. I have a propane fireplace, and the pilot flame was erratic. The unit would light the main burner, then go out after a short fashion. I realized that when the main burner was lit the pilot was going out, and the flame sensor is near the pilot so it would trip the system. I recconed that the regulator was to blame, of all things it would work fine when the temps were above freezing, so I placed a light bulb near the regulator and temporarily covered the regulator, no issues. I am assuming that the regulator has some moisture in it, so it is to be replaced before next winter.

Cheers!!

does it have an oxypilot? this will lift the pilot off the thermocouple device if the oxygen content is to low(fire not clearing all of its products of combustion) also this type of pilot has a small hole in the side which blocks very easily with lint causing the pilot to become floppy and burn yellow giving the same type of poblem