BoilerFaultCodesYour heat pump has stopped working because its internal computer board is having trouble communicating with the motor that runs the system.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Inverter Error
What causes this fault?
This fault occurs when the system's brain and the high-power motor that drives the heating process stop talking to each other. It is usually caused by an internal electrical failure on the inverter board or a loose wiring connection that prevents the system from regulating its power levels safely.
This fault can be more prevalent during summer or during sudden heatwaves, as the inverter components are under higher thermal stress when the unit is working hard to provide cooling or high-temperature hot water.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like LC1 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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