Viessmann VITODENS 111-W Installation And Service Instructions Manual page 65

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. In the event of severe deviation
replace the sensor.
Troubleshooting
65