I'd appreciate your help on this.

I heard the power vent fan running long after the last shower and knew it was in a lockout condition. I cycled the power to see what would happen. The pressure switch closed but the ingniter didn't glow at all.

I suspect that it's ether the ignition control module (HS74ln-104A) or the "glow plug" isad. How do I tell which on is bad? Do you think it could be something else?