d.96 Medium

Heatline d.96 Fault Code

Also written as D96 — same fault.

The Heatline d.96 fault code means: your boiler has reverted to its original factory settings, which usually occurs after an electrical reset or a memory glitch and means the unit currently lacks your custom heating and water configuration.. It appears on 7 Heatline 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: Factory reset
Typical repair cost £90-180 (including labour)

Engineer required

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

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Heatline models that show the d.96 fault code

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

Source

Heatline d.96 fault code information on this page is sourced and cross-checked against the official Heatline service / installation manuals for each affected model.

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