I woke up this morning to no heat. I went down and started searching on the web for answers. I checked all the rubber hoses and they all seemed very clear and air tight. I found someone with the same furnace and same furnace. The tech told him to bypass the pressure switch. Before I did so, I got no glo from the igniter. After following his instructins, the igniter kicked on, but only for about five seconds. Does this mean that the pressure switch is bad, or are there other things to check? Please help, I can't afford a tech to come to the house if I can fix it myself. Thanks so much, Ken