BoilerFaultCodesTechnical description
DHW ignition error
What causes this fault?
This fault occurs when the boiler fails to establish or sustain a flame specifically while trying to heat your tap water. It is usually caused by a component failure that prevents the spark from jumping or the gas from flowing correctly, meaning the system cannot safely ignite to provide heat. The most common reasons include a worn-out ignition probe or a faulty gas valve that isn't opening as it should.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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