Another bit of advice,, if you have the blower in your hand and there's an air compressor nearby, give it a good blast of air. Mine had alot of crap in it. If this yields a notable amount of stuff and you get it back in there run the thing on nothing other than high for a while. It'll get rid of anything that's left in there. The problem is that often we don't run the fan fast enough to get rid of dust that builds up and restricts cooling the motor. Also be sure the motor ventilation tube is tight fitting.