I have a York Diamond 80 Model P2MPD16N09601G. The blower comes on but no flames. I checked the igniter assembly and it wasn't heating up, so I replaced it since this has worked in the past. It still doesn't heat up and glow. I also steel wooled the flame sensor, since I had to do that once before as well. I have also shup power off at circuit breaker for several seconds and restarted. Still, the blower will kick on like it wants to start, but no flames. Any suggestions?