> early models with auto-defrost and any models with door ice dispensers

I have one of these offenders. I cut the wires to the "always on" condensation heater and plugged the ice chute. I currently use a system to skip usually every other defrost cycle, but there is a permanent fix using a rheostat from those old halogen floor lamps to vary the power to the heating element itself (half is good starting point from what I hear).