Fresh Food Thermistor - Viking VCSB542 Service Manual

Service Diagnostics and Procedures
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power to unit using power
switch before servicing. Wires removed during disassembly must be replaced on proper terminals to insure
correct earth ground and polarization. After servicing, reconnect power using power switch.
Freezer and Fresh food Thermistor
Resistance of thermistors can be checked at the
3-pin Molex board as shown on page 47 or if
necessary at the LV Board.
Top three wires are for Thermistors. Black with
white tracer is common, Yellow with white tracer
is the freezer thermistor, and Orange with white
tracer is the fresh food thermistor. Both should read
approximately 25 – 30 K-Ohms at ambient.
The unit uses a thermal device called a temperature
thermistor. As the temperature in the compartment
changes, the resistance in this device changes.
These changes are measured by the low voltage
board and controls operation of the fresh food fan.
Refer to thermistor chart on page 38.
© 2010 Viking Preferred Service
WARNING
TP3 – Common
TP1 – Fresh Food Thermistor
TP2 – Freezer Thermistor
1. To access the thermistor remove fresh fan cover
(see fresh food fan procedure).
2. With cover lowered, unsnap thermistor from
cover, disconnect wiring and repair replace
thermistor.

Fresh Food Thermistor

3. Reverse procedure to reinstall.
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