Medium
70/90 on Grant Euroflame Condensing

Your boiler is displaying its power output identification code rather than an error, which usually means the system's electronic brain is failing to read the boiler's settings correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

Model and Heat Output (kW/Btu/h) - 20.7 (70 600) / 22.7 (77 500) / 25.6 (87 350)

From this model's manual
Verified against the Grant Euroflame Condensing installation & service manual, page 8.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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