How much does it cost to fix Sime error code A7?

Typical repair cost for the Sime A7 fault is £150-300 including labour.

A7 Medium

Sime A7 Fault Code

Q: What does the Sime A7 fault code mean?

Your boiler has recorded an internal memory error, which is often a sign of a temporary glitch that might resolve itself or a deeper issue with the boiler's main brain.

The Sime A7 fault code means: your boiler has recorded an internal memory error, which is often a sign of a temporary glitch that might resolve itself or a deeper issue with the boiler's main brain.. It appears on 1 Sime model in our database.

Technical description: Code of last error -7

Typical repair cost £150-300 (including labour)

Engineer required

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

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Sime models that show the A7 fault code

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

Metropolis DGT 25 BF Repair: £150-300

Source

Sime A7 fault code information on this page is sourced and cross-checked against the official Sime service / installation manuals for each affected model.

Sime Metropolis DGT 25 BF manual (PDF)

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