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®
© 2009 Viking Preferred Service
17
Component Testing
The chart shown here is a Temp-to-Resistance Chart
for RTD.
The oven sensor is also know as a P.T.C. (Positive
Temperature Control) device which means that as
the temperature rises, the resistance increases.
RTD (Resistive Thermal Service)
Temperature (˚F)
Resistance (approximate)
50
1038
75
1090
100
1143
200
1350
300
1553
350
1654
400
1754
450
1852
500
1950
550
2047
600
2153
650
2238
700
2332
750
2425
800
2518
850
2609
900
2700
Component
Reading
Test Location
RTD
5 VDC
P5 connector at
thermostat black
to yellow
Convection
Motor
120 VAC
Red to white at
motor
Blower Motor
120 VAC
White to black at
blower
High Limit
245 ˚F N.C.
Blue to black at
high limit
Thermal Limit
160 ˚F
Black to white at
limit
Service Diagnostics and Procedures