How much does it cost to fix Ideal error code 398 051?

Typical repair cost for the Ideal 398 051 fault is £180-350 including labour.

398 051 High

Ideal 398 051 Fault Code

Q: What does the Ideal 398 051 fault code mean?

Your boiler has detected a communication failure with the component that controls the gas flow to the burner, meaning the boiler cannot fire up to provide heat.

Also written as 398051 — same fault.

The Ideal 398 051 fault code means: your boiler has detected a communication failure with the component that controls the gas flow to the burner, meaning the boiler cannot fire up to provide heat.. It appears on 1 Ideal model in our database.

Technical description: Main burner injector (RS 485)

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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Ideal models that show the 398 051 fault code

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

Mexico Super CF3 40-80 Repair: £180-350

Source

Ideal 398 051 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026