Operating instructions

132
Checking the outlet temperature sensor or comfort sensor
(combi boilers only)
B
A
10
1
10 30 50 70 90 110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance in kΩ
Sensor type: NTC 10 kΩ
1. Disconnect the leads from outlet tem-
perature sensor
A
or comfort sensor
B
.
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. Close the
cold water shut-off valve. Drain the
DHW line and the plate heat
exchanger (DHW side).
Troubleshooting
Repairs
(cont.)
5772 909 GB