94 Medium

Keston 94 Fault Code

The Keston 94 fault code means: your boiler is successfully heating your radiators, but a component failure is preventing it from providing hot water to your taps.. It appears on 1 Keston model 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: NO HW BUT CH ON
Typical repair cost £180-350 (including labour)

Engineer required

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

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Keston models that show the 94 fault code

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

Source

Keston 94 fault code information on this page is sourced and cross-checked against the official Keston service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026