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F.454

F.454 — Burner in fault state: Incorrect software version

Viessmann · Vitodens 100-W Boiler

What does F.454 mean?

The burner is in a fault state because the BCU burner control unit has an incorrect software version. This needs to be corrected for proper boiler operation.

Common Causes

  • Incorrect software version on BCU burner control unit

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the boiler by briefly turning off and on its power supply.

  2. 2

    Contact a qualified heating engineer to flash the correct software version for the BCU burner control unit.

  3. 3

    Ensure the engineer has access to the latest compatible software for your boiler model.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

Connection errorConnection error — Displayed on programming unitF.142F.142 — Burner in fault state due to CAN bus communication errorF.160F.160 — Burner in fault state due to CAN bus communication error
Source: Viessmann Vitodens 100-W Boiler
Open Manual (Page 80)Search more codes in this manual