Viking VCSB48, Service Notebook, Page: 20 / 33

20
Electronic Function Description
Refrigerator and Freezer Compartment theory of
Operation
If both freezer and fresh food thermistors are warm,
their resistance drops (see table Refrigerator and
Freezer Thermistor in Temperature Control Section)
and the electronic signals for compressor / condenser
fan motor operation and for operation of fresh food
and condensate evaporator fans.
After freezer thermistor cools sufficiently to raise
resistance and block the signal to the electronic
control, compressor / condenser fan motor will shut
off.
However, fresh food and condensate evaporator fans
will continue to run until fresh food thermistor cools
and signal is blocked to electronic control.
If fresh food thermistor cools before freezer
thermistor, electronic control will interrupt circuit to
fresh food and condensate evaporator fans while
evaporator fan motor will continue to operate under
control of freezer thermistor.