E96 Low

Keston E96 Fault Code

The Keston E96 fault code means: your boiler is having trouble communicating with the optional solar water heating system, which may prevent your hot water from being heated by solar energy.. It appears on 1 Keston model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Solar tank sensor open circuit - if present
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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Keston models that show the E96 fault code

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

Source

Keston E96 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