I have a Goodman furnace that we just replaced the vent motor on. It worked fine for about 2 hours and then it came on but would not ignite. The fan comes on and several seconds later you hear a click but the ignitor does not glow. I sucked on the line going to the pressure switch and it seems to be OK, it holds the pressure when you suck on the tube and you can hear the diaphram move. I think it's a bad ignitor, what do you think?

The ignitor should glow. If not replace. It is the cheapest part. You might also test it. I believe there are notes on this in the sticky notes at the beginning of this board. You will need a ohm meter.