Boiler Water Temperature Sensor - Viessmann Vitodens 100-W WB1B Installation And Service Instructions Manual

Repairs
(cont.)

Boiler water temperature sensor

1. Pull the leads from boiler water
temperature sensor A and check
the resistance.
2. Check the sensor resistance and
compare it with the curve.
3. In case of severe deviation, drain
boiler on the heating water side and
replace the sensor.
Danger
The boiler water tempera-
ture sensor is immersed in
the heating water (risk of
scalding).
Drain the boiler before repla-
cing the sensor.
Troubleshooting
39