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FA

FA — Fan not at standstill

Viessmann · Vitodens 200-W B2HB Boiler

What does FA mean?

The burner is in a fault mode because the fan was not completely stopped when it was supposed to be, indicating a control or mechanical issue.

Common Causes

  • Malfunctioning fan
  • Damaged fan connecting cables
  • Faulty fan control unit

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Press the reset button 'R' on the boiler.

  2. 2

    Listen for any continuous fan noise when the boiler should be idle.

  3. 3

    Contact a qualified heating technician to check the fan, its connecting cables, and the fan control unit.

Browse all codes in this manual (56)
Verified technical data. Last updated: April 2026

Related Faults

0F0F — Boiler requires service1010 — Short circuit on outdoor temperature sensor1818 — Outdoor temperature sensor cable broken
Source: Viessmann Vitodens 200-W B2HB Boiler
Open Manual (Page 82)Search more codes in this manual