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F.142

F.142 — Burner in fault state due to CAN bus communication error

Viessmann · Vitodens 100-W Boiler

What does F.142 mean?

The burner is in a fault state because of a communication error on the CAN bus. This indicates a problem with how different components are communicating.

Common Causes

  • Fan unit malfunction (stepper motor)
  • Faulty plug-in connections or cables of the CAN bus
  • Issues with other CAN bus subscribers

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the fan unit for correct function; observe it during a mains ON reference run.

  2. 2

    Visually inspect all plug-in connections and cables of the CAN bus for firm seating and damage.

  3. 3

    If the fault still persists, contact a qualified heating engineer, as the fan unit or other CAN bus components may need replacement.

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

Related Faults

Connection errorConnection error — Displayed on programming unitF.160F.160 — Burner in fault state due to CAN bus communication errorF.161F.161 — Burner in fault state due to BCU data memory access error
Source: Viessmann Vitodens 100-W Boiler
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