Boiler Temperature Sensor - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Troubleshooting
Repairs
(cont.)

Boiler temperature sensor

72
1. Pull the leads from boiler tempera-
ture sensor A and measure the
resistance.
2. Check the sensor resistance and
compare actual values with the
curve.
3. In case of severe deviation, drain
boiler on the primary side (see
page 71) and replace the sensor.
Danger
The boiler temperature sen-
sor is immersed in the heat-
ing water(risk of scalding).
Drain the boiler before repla-
cing the sensor.