What does the Vaillant P3 fault code mean?

Your boiler is struggling to accurately detect its current temperature, which has caused it to pause its heating operation as a safety precaution.

How much does it cost to fix Vaillant error code P3?

Typical repair cost for the Vaillant P3 fault is £120-250 including labour.

Manufacturer manual

Mid setting point

Shared across the range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like P3: no call-out fees, no surprise bills.

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