BoilerFaultCodesWhat the manual says
Manufacturer manualGas valves do not close; check the voltage on the gas valve. If a voltage is measured on both the gas valves (> 20 V), the control panel should be replaced. When ionisation occurs while the unit is not operational, the ionisation circuit should be checked. If the control panel and the ionisation function properly, the gas valve has to be replaced.
From this model's manual
Verified against the Ideal/Ideal Maximiser Se installation & service manual.
Engineer required
This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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All 40 fault codes on the Maximiser SE 42
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