Viessmann Vitodens 100-W Installation And Service Instructions Manual page 46

Troubleshooting
Repairs
(cont.)
Checking the flue gas temperature sensor
A
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50 70 90 110
Temperature in °C
46
1. Disconnect the leads from flue gas
temperature sensor A and check
the resistance.
2. Check sensor resistance and com-
pare it to the curve.
3. In the event of severe deviation
replace the sensor.