I have an Arrow DM10 stand-alone gas fireplace that was built in 1993. It has a working pilot and a new thermopile. It will not light on its own.
After replacing the thermopile with no result, I poked about on Google and found someone that said I should tap the gas manifold. I did and it started right up.
Unfortunately it didn't say WHY this might work. Anyone know what might cause this?