That is one very nice parts list, better than dometic's..
And yes, for the past 6 weeks, I have been pulling the complete icemaker assy, and then item 53, "cover with drip pan" (which is the part that contains the heat strip) to access the frozen up cooling fins and melt the ice with a hair dryer.
Not a fun job, and really hard on the ice cream.
the heat strip will be here Wednesday, along with some other tidbits.
Tomorrow, I'll slide the fridge into the cabin far enough to get at and replace the drain hose (it's been broken for years, but I'm sure it is leaking warm humid air into the fridge and freezer.
I'll also get some plumbers putty, and work on sealing the piercings where wires and hoses and things penetrate the box.
I'm also getting a lot of ice around the edges of the ice container shelf and it's lower box, I'll do something to better seal where they join.
But when you get right down to it, freezer get a lot of warm humid air, everytime someone opens the door...
This thing is supposed to defrost itself. I've run through all it's tests, all the hardware works. I've never got a "failed defrost cycle 2 times in a row" error, so the defrost cycle is running, successlfully (this is defined in the PCB as it reached 44 degrees on the cooling fins for the proscribed period of time)
I'm really not up for replacing it. It used to work really well. The cooling unit is fine, and any other problems should be cost effective to repair...