High
Gas Valve Fault on Ideal Logic Max Heat 2

Your boiler has detected an electrical issue with the gas control system and has shut down as a safety precaution.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Contact electricity provider

Shared across the Logic Max HEAT2 range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

What causes this fault?

This fault occurs when the boiler's main control board loses the ability to communicate with or power the gas valve properly. The most common reason is an internal electrical failure within the valve's solenoid or a communication break in the wiring harness connecting the components. As the boiler cannot safely regulate the flow of fuel, it shuts down immediately to prevent any risk.

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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All 84 fault codes on the Logic Max Heat 2

Seeing a different code? Every code this model can display, in one place.

4.24.34.44.54.64.74.84.94.104.114.124.134.144.154.16059.1.59.1.8121314151617181924252829303132363738435460657071758283113115116Blocked Flue/CondensateE4EAEdF9Fan FaultFdFlame LossFlame On Before Gas OnFlame on before gas valve onFlow Thermistor FaultFlow/Return ReversedFUSEH nH0Ignition LockoutL AL EL1LCDLow Mains VoltageNO CH OPERATIONNo Water FlowOutside Sensor FaultOverheat LockoutP1P4PCB FaultReturn ThermistorReturn Thermistor FaultRoom Thermostat FaultService DueService RequiredSpare PCB Not SetToo Many Restarts

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