How much does it cost to fix Johnson Starley error code GAS VALVE NOT OPENING?

Typical repair cost for the Johnson Starley GAS VALVE NOT OPENING fault is £180-350 including labour.

GAS VALVE NOT OPENING High

Johnson Starley GAS VALVE NOT OPENING Fault Code

Q: What does the Johnson Starley GAS VALVE NOT OPENING fault code mean?

Your boiler is unable to release gas into the burner to create a flame, meaning your heating will not work.

Also written as GASVALVENOTOPENING — same fault.

The Johnson Starley GAS VALVE NOT OPENING fault code means: your boiler is unable to release gas into the burner to create a flame, meaning your heating will not work.. It appears on 1 Johnson Starley model in our database.

Technical description: Resistance between gas valve pins not 114Ω or lack of 240V AC output from PCB/Display.

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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Johnson Starley models that show the GAS VALVE NOT OPENING fault code

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

Warmcair DW Repair: £180-350

Source

Johnson Starley GAS VALVE NOT OPENING fault code information on this page is sourced and cross-checked against the official Johnson Starley service / installation manuals for each affected model.

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