How much does it cost to fix Keston error code E01 074?

Typical repair cost for the Keston E01 074 fault is £250-450 including labour.

E01 074 High

Keston E01 074 Fault Code

Q: What does the Keston E01 074 fault code mean?

Your boiler is failing to light the flame properly because it cannot communicate with the internal safety controls.

Also written as E01074 — same fault.

The Keston E01 074 fault code means: your boiler is failing to light the flame properly because it cannot communicate with the internal safety controls.. It appears on 3 Keston models in our database.

Technical description: Ignition Control Box

Typical repair cost £250-450 (including labour)

Engineer required

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

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Keston models that show the E01 074 fault code

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

K170 Repair: £250-450
K170 Repair: £280-550
S30 Repair: £250-450

Source

Keston E01 074 fault code information on this page is sourced and cross-checked against the official Keston service / installation manuals for each affected model.

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