© 2009 Viking Preferred Service
31
Service Diagnostics and Procedures
Cooling Fan
The cooktop uses cooling fans to help with heat
management. The fan ensures the electronics and
switches are kept cool during cooking modes as
well as pulls excess heat from the cooktop. The fan
(X57) is 12 VDC, 0.38 amp, 4.6 W, 9400
Ω
.
NTC Temperature Sensor
The cooktop uses a N.T.C. sensor under the main
glass top. It is used for two purposes. One is to
protect the inductors and the second is to detect
an overheat situation. In either case, once an over
temperature is detected, the unit shuts down.
Measure the resistance of the sensor and compare
to the chart below.
˚F
˚C
Rnenn
Ro
Ru
32
0
917.56
920.88
914.23
77
25
1001.7
1006.7
996.7
122
50
1085.5
1092.2
1078.9
167
75
1168.7
1177.1
1160.4
212
100
1251.3
1261.4
1241.4
257
125
1333.3
1345
1321.7
302
150
1414.7
1428.1
1401.4
347
175
1495.5
1510.5
1480.5
392
200
1575.6
1592.3
1559
437
225
1655.1
1673.5
1636.9
482
250
1734
1754
1714.2
527
275
1812.3
1834
1790.8
572
300
1890
1913.3
1866.9
617
325
1967.1
1992
1942.3
662
350
2043.5
2070.1
2017.1
Cooling Fan
Test Points
