F.72 — Flow and/or return NTC fault (tolerances too big)

What does F.72 mean?

A fault has been detected with either the flow NTC, return NTC, or both sensors. Their measured values are outside acceptable tolerances, indicating a defect.

• Flow and/or return NTC is defective (tolerances too big).

Click steps to track your progress.

1. 1

   Reset the boiler by pressing the reset button.

2. 2

   Power off the boiler, wait a moment, then power it back on.

3. 3

   If the error persists, contact a qualified service technician to inspect or replace the flow and/or return NTC sensors.