Boiler displays A15, the burner does not start, gas supply appears normal.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

defective gas valve coil, stuck gas valve mechanism, no control signal from PCB, incorrect wiring to gas valve

Critical safety: Only a Gas Safe / certified technician may work on gas valves. Do not attempt DIY repairs.

Technician procedure:

Confirm the mains gas supply and inlet pressure to the boiler.
Measure the voltage at the gas valve coil(s) during an ignition attempt.
If voltage is present but no gas flow, replace the gas valve assembly with an IVT-approved part.
If no voltage is present, test the PCB gas valve driver and safety interlocks (air pressure switch, overheat, etc.).

Professional Required 5/5

Gas Valve Assembly

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