I had the FV-****vq* installed but it's making loud clicking sound. The time for instal...

I had the FV-****vq* installed but it's making loud clicking sound. The time for installer to install it took some time, but got it done, as for climbing up in the attic etc. I can't do that with my being disabled. I want to know when I return this to the store and exchange it if I have to get the exact same Panasonic fan or if another similar model with perhaps more capabilities etc uses the exact same housing and if removing the old fan from the housing is simple unplug and plug in new one with exactly the same model, and is such a capability exists with some of your other models using the housing and bracket that was already installed, with simply unplugging the power clip, and unhooking the fan clips so it drops out, without the above insulation above the housing coming down. Is it when it was installed is there housing installed so that the existing main fan unit just clips in and then can as easily be disconnected and replaced with the exact model, and also is there a different model with exact same other base parts with same size frame, housing and clips etc so that the main black fan unit can simply be unplugged and a new one swapped in?****Michael Benson*B*****@***.com