I got my york furnace a few years ago and already had to replace the circuit board last year now this year my furnace will kick on but burners will kick on for about 3 sec then kick right back off it repeats this same pattern about 3 or 4 times before the burners just stay off and then it sounds like the blower kicks and only blows out cool air not like air conditioner cool but kind of just like having a fan on low cool then it just stays on until I go and remove the covers and put them back on then it will work fine for one or two cycles then the whole pattern starts all over... please tell me what you think it might be I have spent so much money fixing an almost brand new furnace and I'm hoping this is something I can fix myself. I've also made sure that it has a new clean filter.. and suggestions would be great!