Viessmann VITODENS 111-W Installation And Service Instructions Manual page 49

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. Pull leads from flue gas temperature
sensor A.
2. Check the sensor resistance and
compare it with the curve.
3. Replace the sensor in the case of
severe deviation.
Troubleshooting
49