Our radon fan is making a lot of noise. It is out of warranty so I'd like to save $$ and replace it myself with a new one. The problem is after I loosen the couplings on the top and bottom pipes, there is still some pipe connected on each end of the fan that is preventing me from just sliding it out like I see on how to videos. How can I dislodge the fan without having to cut through these pipes? Thanks!