We just installed a double Bosch Benchmark Wall Oven and not happy with the cooling fan noise (not the convection fan). Went to the trouble before ordering this of going to a Bosch showroom to demo one of these and it did not sound like this - wondering if they disconnected the fan to make it sound quiet.

I had service people over and they said it's normal and replacing the fan would not help. Can anyone recommend anything to improve this? If not replacing the fan any kind of modification I could have done at my cost?

Thanks to any who can advise