"Chrissy Wellard" wrote in message
...
I get this annoying noise when my furnace kicks on, it sounds as if it's
going to explode or something.

What on earth could it be?

My neighbor had this problem, and it turned out that the gas jet
for the pilot light was partly plugged, so the flame was too small
to quickly light the burner. I removed the jet, cleared it with a fine
wire. Problem solved.

Bob