I have moved into a ground floor flat. There was an extractor fan in the bathroom but it only went on and off when the light went on & off, so I asked my electrician to fit a new one which he did. The fan is very quiet but my neighbour upstairs complains of vibration through the walls. The electrician loosened a few screws which reduced the vibration yesterday and the neighbour was happy, but I had a bath last night and shower this morning. Now the neighbour is saying it's still vibrating and is very noisy. I don't know what to do to make this better. The fan is in the same place as the previous one and he didn't complain about that. Please can anyone help? He is a nice guy and I don't want to disturb him but I also need to be able to use an extractor fan! Thank you.