BoilerFaultCodesYour heat pump has encountered a communication or power issue within its internal electrical control system, meaning it cannot currently heat your home.
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 brain of the heat pump loses touch with the power unit that drives the compressor. The most common reason is a failure in the electrical circuits or loose wiring connections, preventing the system from drawing the power it needs to generate heat. Essentially, the internal components can no longer talk to each other to coordinate the heating process.
This fault may appear more frequently during peak winter months when the inverter is under high load to maintain home temperatures in freezing conditions.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like LC7 — 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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