I forgot to note...this furnace is in a split level house not a mobile home. It is only 8 yrs old as well. Not sure if that matters...

I have been having problems for two years with my colman furnace. The flame will ignite and stay on for 4 or 5 seconds, the blower will kick on and then the flame will go out. I usually clean the flame sensor and then it works again. About a month ago it was doing the same thing and when I cleaned t...