I am looking for some help here. I have worked with my fair share of furnaces, but this one is really got me confused. I am not sure on the brand, (I believe it is ICP). The model # is GDE075B12A1. It is a downflow furnace. It was a used furnace when I got it, and I temped power and gas to it to assure it was in working order before I installed it. It was almost a year before it got installed, and now it will not light. I suspected the honeywell smart valve, and replaced it. I also replaced the ignitor/flame sensor just for good measure. Everything works in the proper sequence, and the ignitor glows as it should. The gas to the pilot comes on as it should. However, the ignitor will not light the gas. I have checked the voltages, and all seems to be fine. I can hold a match to the pilot when the ignitor is glowing, and the furnace functions perfectly. I just cannot figure out why the ignitor will not ignite the gas! Can someone please help me out! Thanks!