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Greetings all, I'm trying to think through this process, and see what others may have done to resolve the problem. My story continues similarly to the story of other Whirlpool Gladiator owners. I purchased mine 4-5 years ago for a great price secondhand locally (Bakersfield , CA) Within a few months it started to ice up again. Model # GAFZ21XXRK02, August 2008 manufacturing date. Started with the copper wire wrapped around the defrost heater trick... Seemed to help, but then over time lost efficiency. Inspecting, it has started to corrode and was about 1/2 it's initial diameter in spots. Removed that and installed the official Whirlpool kit (819043)... Still freezing up. I live in a pretty arid region - we average about 6-7" of rain annually, and it is rarely humid. On my short list of things to check are the door seals and the defroster operation (I did check the resistance when I put the kit in, and it was within spec). My question: I see there are drain defrosters available for other makes and models, why couldn't this be added to my unit? Thinking through the possible issues, they might include: additional element may draw too many amps through that circuit, and would have to have a separate AC circuit (And relay(, and of course finding a drain heater that will work for this application (narrow enough to fit down drain, doesn't heat to the point of melting the drain tube). So suggestions on an appropriate part would be appreciated. Thanks in advance for your help!

My Subzero 650 (36" bottom freezer) works great and keeps refrigerator compartment at a steady 34 F. But ice forms on the bottom rear behind the vegetable crisper and it gets so thick that the drawer won't close all the way. If it gets much worse, I'm afraid the fridge door won't close. Below are two pix -- one with ice, and the other after melting the ice with a hair dryer. Am I just keeping the fridge too cold?