My 1600 HN would occasionally not work, and then mysteriously work out of the blue. It currently makes no attempts to work, no clicking from the ignitor or anything else. I do not know where to check voltages on this unit, or what they should be. I really dont want to call a technician for something I can fix myself, but don't want to spend a fortune tossing parts at it until I find waht was wrong. Any advice would be appreciated.