Viessmann VITODENS 333 Service Instructions Manual page 86

Troubleshooting
Repairs
(cont.)
Checking loading temperature sensor
86
2. Check the sensor resistance and
compare actual values with the
curve.
3. Replace the sensor in case of
severe deviation.
Danger
The boiler temperature sen-
sor is immersed in the heat-
ing water (risk of scalding).
Drain the boiler before repla-
cing the sensor.
1. Pull the cables off loading tempera-
ture sensor A.
2. Check the sensor resistance and
compare actual values with the
curve.