Thanks for link - Electronic Controled Freezer 5995482584
was the key (filename: 472_ElectronicControledFreezerServiceManual.pdf)
from Page 50 - Section G - Troubleshooting Chart (Deluxe Electronic Control model)
- symptom - user interface display is blank.
I detached user interface module from the door and measured the voltage between the brown and orange wires in the plug - was essentially zero (25mV - i.e. open)
Got to back of Freezer, found Electronic Control module, and detached 4-pin plug. Measured voltage between red wire and black wire (4.95VDC)
Looks like I've got an open connection between the User Interface display and the Electronic Control Module. May see if I can breadboard up a header to connect the two together directly to verify.
Also, page 5-7 (45) of "707_Upright_Freezer_with_Standard_and_Electronic_Controls_5995531505.pdf" appears to be my unit - that is how the thermistor and defrost thermostat were arranged, with the thermistor attached to the back wall of the freezer compartment behind the evaporator cover.
The schematic on the back of my unit shows only one thermistor - do they generally show only one even if multiples?
Thanks again for the link...