Anybody know how to remove, or even just move, the rear blower unit in order to access the matrix? I can see three screws holding it to the body but even when these are removed the unit doesn't want to budge. Mine has AC as well so I imagine these pipes are somewhere below and possibly hold the unit in situ? Anyone done this before? I just need to move it enough so I can unplug the feed and return pipes (so I cna replace them).