Im working on a hussmann rack that is controlled by a Comtrol 4K. I am not too familiar with these and does not help that the screen is blanked out. Where can I get a new one of these or can I just replace the screen? I think that the suction transducer is reading high, cause the controller is running the rack about 8# too high.. making my meat cases run lil warm. I cannot verify that with the screen being out. I dont have a spare transducer either.. maybe that would be the better route? The customer has seen the controller and would fix/replace it though..