We have a Heat and Glow vented gas log fireplace that is about 7 years old. It is used very seldom and may go an entire winter season and only be used once or twice.
About 3 months ago we noticed an odor even though the unit was not being used. The odor is not constant or at the same level of severity. We seem to notice it more on an overcast day.
We called the installer and had the gas company check it, but they did not find any problems. At the installers request, we ran the unit for about 6 hours to "Burn off" anything that may have accumulated on the firebox. We also cleaned the firebox as best we could, but there is no way to get to the back of the unit.
This has been very perplexing !!! Can anyone help ?