Safety first , I shut off the circuit breaker . I removed the racks from inside the wall oven . I removed the the wall oven from the niche .Then removed the three sheet metal panels in the rear of the oven exposing the mounting screws that hold the blower down .I removed the wires from the blower motor and then the blower assembly ,then I removed the small duct affixed to the blower assembly by a single sheet metal screw and transferred it to the new blower assembly . I installed the adhesive backed foam strip that is a vibration dampener and reassembled in reverse order.Once the over was returned to its original position in the wall mounting I turned the breakers back on and tested the oven ...AAAAAAAAA++++++++++++ To be fair i must admit that I am not a novice at this 15 years of my working career revolved around HVAC and appliance repair ,still however a novice that is mechanically inclined can perform the same task in about 70 to 80 minutes as opposed to my 35 . That is all there is to it.

Remove oven from wall, remove top and back covers.Remove old fan assembly. The new assembly fit right in and works great.

Easily, Removed the oven with help of my grandson, this model is quite heavy. Open the back cover panel, removed the old blower. replaced with the new blower, covered with the back protective panel. About one hour because some screws much harder to reach.