I have a York Stellar P3CCD12N06101A it lites and runs fine but I noticed that the fan limit will reach it limit then flames go out. When it cools down it lites again. Starts this cycle all over again.It will never let the t-stat reach the temp it is set at. I think maybe the blower isn't blowing fast enough to keep heat chanber at the right temp. I replaced the blower back in the summer and its been runnig fine so far this winter. Until last night.