Last night i replaced the exhaust blower. 7/16 rachet and a phillips screw driver was all that was needed...and an arm/hand that can contortion into any position. The 2 top bolts where ball busters to get off. 1/8 turns at a time. Ugghh. All in all it took about 2 hours. The sound level is night and day difference. Not sure why i waited so long to replace it. I should of took pics...