How much does it cost to fix Ariston error code B06?

Typical repair cost for the Ariston B06 fault is £150-250 including labour.

B06 High

Ariston B06 Fault Code

Q: What does the Ariston B06 fault code mean?

Your boiler is struggling to detect that there is enough water flowing through its internal system to safely turn on your heating.

The Ariston B06 fault code means: your boiler is struggling to detect that there is enough water flowing through its internal system to safely turn on your heating.. It appears on 6 Ariston models in our database.

Technical description: Pressure Switch for Heating Circuit

Typical repair cost £150-250 (including labour)

Engineer required

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

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Ariston models that show the B06 fault code

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

Challenger 80E Repair: £150-250
E-Combi One Repair: £150-250
E-Combi One 30 Repair: £150-250
Euro Combi 30 MFFI Repair: £0-120
Euro Prisma 24 Repair: £90-180
Microsystem 15 Repair: £150-250

Source

Ariston B06 fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

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