Thanks for your response Dan Will have to check on the size of filter(12 or 14 inch)-is that size of actual filter or housingIJ As far as what I have done: both hoses have been replaced with rubber instead of the "bendy" metal ones(one on old N5 was this type and never had problem),pulled the swirly thing off the top of housing and flushed with water-water flowed thru with no blockage present--did notice that one of bottom funnels had melted,do think that sensor may be a little sensitive but filter is definitely stopping up-during wheat harvest on second or third day of operating machine loss of power was very evident, I thought it might have been fuel filter so changed it first then checked air filter and it was packed. Ever since I have been blowing out at least every other day-seem to not get as dirty with corn- not as much dust but lite continues to come on especially when running at max power. The fitting on the back exhaust aspirator looks like it has been rewelded to exhaust pipe, I'll try the water thing to see if they are pulling anything. By the way will the aspirators on the Deutz motor set the air cleaner on fire if they wear out_fall apartinside_etcIJ We had a fire on N5 once due to that. Also, what causes funnels to melt on bottom of swirly thingIJ