[airforceret]

I have had a similar issue twice in the many years I've camped.

1) The first time this occurred, the igniter had failed and needed replaced. It was easy to tell it was failing because it was not making that distinctive "clicking" sound that an igniter makes.

2) The second time this occurred, they found a toasted spider inside that was causing a false read on some sensor (or something like that).

Good luck...