JP9 Medium

Vokera JP9 Fault Code

The Vokera JP9 fault code means: your boiler's internal settings are currently confused because a small configuration plug has been moved or become loose, preventing the heating system from turning on.. It appears on 3 Vokera models in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: C/H Delay Timer jumper
Typical repair cost £90-160 (including labour)

Engineer required

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

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Vokera models that show the JP9 fault code

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

Source

Vokera JP9 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.

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