Viessmann VITODENS 100-W Installation And Service Instructions Manual page 47

Repairs
(cont.)
Checking the outlet temperature sensor (gas condensing combi
boiler)
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 outlet temperature
sensor A.
2. Check the sensor resistance and
compare it with the curve.
3. Replace the sensor in the case of
severe deviation.
Note
Water can leak when replacing the
outlet temperature sensor. Shut off
the cold water supply. Drain the DHW
line and the plate heat exchanger
(DHW side).
Troubleshooting
47