The Toshiba airco is 3 years old, I like to replace the fan because of uneven humming.

any suggestion, whom to call ?

how often have you had it cleaned?

Clean it before you try anything else. It isnt hard. Also which fan ? the outside condensor unit or the one in the in room cooler ? Both need doing every now and then

it was cleaned just a few days ago. It's the room unit fan, the compressor is located on the ground floor not to be haerd. As I said, it's a humming but slightly uneven noice which disturbs me. I want a new motor, as silent as possible.