Well, I was just able to get back to this project . There were 4 nut screws on the back freezer panel two of which are ridiculously placed to thwart removal but I got them off. How does one get the plastic vent housing off the back panel ? there is no screws and it doesnt seem to have depressable clips. or does that stay with the back panel? I am now battling the ice maker which needs to be removed in order to get the back panel off (see pic). I can't seem to get the electrical connection clip to release and I assume I have to remove the ice maker as the rear panel needs to be removed by tipping the top toward the front opening as the bottom of the panel can't clear the bottom draw rails. BTW it appears to me evaporator fan is working but the fan next to compressor is not -- is that why the return may be blocked with ice because that fan is not blowing the heat generated from the compressor against that back wall and heating enough so that it does not ice up?