BoilerFaultCodesTechnical description
Gas valve modulation coil fault
What causes this fault?
This fault occurs when the boiler's internal computer experiences a critical electronic failure or loses communication with its sensors. The most common reason is age-related wear on the circuit board's components, though it can also be triggered by a sudden electrical surge or moisture getting onto the control panel.
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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