S.10 — Hot Water Demand via Impeller Sensor Status (EcoTEC Pro / EcoTEC Plus)

What does S.10 mean?

This is a status message indicating that the EcoTEC Pro / EcoTEC Plus boiler has detected a demand for domestic hot water (DHW) through its impeller flow sensor. This is normal operation when a hot tap is opened.

• Hot water tap opened
• Impeller sensor detecting flow

Click steps to track your progress.

1. 1

   This is a normal operational status; ensure hot water is being produced.

2. 2

   If no hot water is flowing, check the water pressure and ensure taps are fully open.

3. 3

   Try resetting the boiler by cycling its main power.

4. 4

   If the issue continues, contact a qualified heating engineer to inspect the impeller sensor.