I have installed a Heat n glo Twilight model - really cool. The ignition is intermittent. I can see and hear the spark yet it won't ignite when it is cold. If I take the glass off, a match will ignite the pilot easily every time - so gas is available. Once the unit is warmed either by being turned on after using a match or late in the day after sun has warmed the box, it works fine. Any ideas?
Questions - does the spark generator need to arc across to another piece of metal?
Could the spark generator be bent and be missing the gas flow?