BoilerFaultCodesTechnical description: PILOT LIT BUT NO MAINS GAS
What causes this fault?
This fault occurs when the boiler successfully lights the small pilot flame but fails to transition to the main burner to heat your home. It is physically caused by a lack of gas flow to the main burner, often due to a faulty gas valve or a blockage in the pilot assembly that prevents the control board from seeing a strong enough signal to release the main gas supply.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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