How much does it cost to fix Viessmann error code 0b?

Typical repair cost for the Viessmann 0b fault is £200-450 including labour.

0b High

Viessmann 0b Fault Code

Q: What does the Viessmann 0b fault code mean?

Your boiler's water circulation system is experiencing a fault, which means it cannot move heat around your home efficiently.

Also written as 0B — same fault.

The Viessmann 0b fault code means: your boiler's water circulation system is experiencing a fault, which means it cannot move heat around your home efficiently.. It appears on 1 Viessmann model in our database.

Technical description: Heating circuit pump

Typical repair cost £200-450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Viessmann models that show the 0b fault code

Click a model for the full fault code list and model-specific repair notes.

Vitodens Repair: £200-450

Source

Viessmann 0b fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026