How much does it cost to fix Keston error code CONDITION 2?

Typical repair cost for the Keston CONDITION 2 fault is £180-450 including labour.

CONDITION 2 High

Keston CONDITION 2 Fault Code

Q: What does the Keston CONDITION 2 fault code mean?

Your boiler is trying to start its ignition sequence, but it is stuck at the stage where the fan is running and it cannot confirm if the flame has successfully lit.

Also written as CONDITION2 — same fault.

The Keston CONDITION 2 fault code means: your boiler is trying to start its ignition sequence, but it is stuck at the stage where the fan is running and it cannot confirm if the flame has successfully lit.. It appears on 1 Keston model in our database.

Technical description: The fan motor starts, does the burner light up?

Typical repair cost £180-450 (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 CONDITION 2 fault code

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

R-sm 20 FB Repair: £180-450

Source

Keston CONDITION 2 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