blower noisy and slow to turn

First I looked at how I would get to the blower - this took 15 minutes. I removed the grills to access the burners. Then I removed the burners that took approx. 15 minutes. I then had to remove the knobs for the burners. Next I had to remove the front control panel which had 2 screws - (did not disconnect any wires but supported it). Next I had to remove the side trim. Next I removed 4-5 screws that secured the upper burner range top. Next I removed the side panels which has a braket on the lower forward side and 2 rear screws on each panel. Next I had to remove the aft backspash guard. At the back I had to remove a support braket that had several screws - then I had to remove the exhaust fan back panel guard. Next I had to remove approx. 7 screws on each side of the stove that supports the burner valves. Then I lifted the left side most closest to the blower. This gave me access just enough to remove the mounting screws (4) and to remove the 2 wires. There was some cushioning material which I found inadequate to prevent any vibration when the fan and the valve support top sits on the blower - so I doubled it. Then I reinstalled everything. This job took me 4 hours. I suggest calling a Kitchenaid repair technician and not doing this yourself. Unless you are a mechanically inclined and really like frustration.