JP8 High

Vokera JP8 Fault Code

The Vokera JP8 fault code means: your boiler has lost its internal configuration settings, meaning it has forgotten whether it should be running on natural gas or lpg, or is experiencing a communication fault with its control settings.. It appears on 3 Vokera models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Timer jumper / Natural gas or LPG selector
Typical repair cost £120-220 (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 JP8 fault code

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

Source

Vokera JP8 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 7 July 2026