F.6 — Flow NTC Sensor Fault (EcoMax Pro)

What does F.6 mean?

This indicates a specific fault with the flow NTC (Negative Temperature Coefficient) sensor in your EcoMax Pro boiler, which is responsible for measuring the temperature of water leaving the boiler.

• Flow NTC sensor fault

Click steps to track your progress.

1. 1

   Reset the boiler by switching off and on at the mains power.

2. 2

   Check for any loose wiring or visible damage around the boiler, though sensor components are usually internal.

3. 3

   If the error persists, contact a qualified heating engineer to inspect or replace the flow NTC sensor.