I bought a replacement Icemaker and Heat-Probe. The disassembly was a two-fer since I would have needed to remove the Icemaker to take out the back panel to access the defroster heating coil to mount the Heat-Probe.
The most time consuming part was the removal/replacement of the frozen foods and thawing the ice buildup on the freezer floor with a blow dryer and making sure the drain was free flowing.