Checking the outlet temperature sensor (only for gas combi
boilers)
A Outlet temperature sensor
1. Pull the leads off the outlet tem-
perature sensor.
2. Check the sensor resistance and
compare it with the curve.
3. Replace the sensor in case of
severe deviation.
Danger
The outlet temperature sen-
sor is immersed in the DHW
(risk of scalding).
Drain the DHW side of the
boiler before replacing the
sensor.
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