How much does it cost to fix Ideal error code 003?

Typical repair cost for the Ideal 003 fault is £150-250 including labour.

003 High

Ideal 003 Fault Code

Q: What does the Ideal 003 fault code mean?

Your boiler is trying to start but the flame is not catching or staying lit, so it has shut down for safety to prevent gas from escaping unburnt.

The Ideal 003 fault code means: your boiler is trying to start but the flame is not catching or staying lit, so it has shut down for safety to prevent gas from escaping unburnt.. It appears on 1 Ideal model in our database.

Technical description: No flame detection

Typical repair cost £150-250 (including labour)

Engineer required

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

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ideal models that show the 003 fault code

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

Maximiser SE Repair: £150-250

Source

Ideal 003 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