This mod changes major interior files in the CR & CT and it will conflict with other interior files, even stock (of course). I think there is a sonar mouse click fix in the downloads section that will fix your problem once propbeanie has you squared away.
Do you have any other mods running that change the interior like, TMO, RFB, Vickers beautiful interiors, etc. These mods all have the fans included so you probably don't.
propbeanie's question is important too, where is your game installed, and a mod list you're using if any would be very helpful.
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