Viessmann Vitodens 100 Series Installation And Service Instructions Manual page 77

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
1. Disconnect the leads from flue gas
temperature sensor A aG.
2. Check the sensor resistance and
compare it to the curve.
3. In the event of severe deviation
replace the sensor.
Troubleshooting
77