BoilerFaultCodesWhat the manual says
Manufacturer manualInverter Error
What causes this fault?
This fault occurs when the heat pump's internal power brain, known as the inverter, fails to communicate with the rest of the system or cannot manage the electricity needed to run the compressor. It is usually caused by an electrical failure within the inverter circuit board or loose wiring connections that disrupt the flow of data. Essentially, the component responsible for regulating the unit's speed and power has suffered a technical glitch or a hardware breakdown.
This error can be more prevalent during summer or extreme heatwaves, as the inverter components are under higher thermal stress while trying to keep the system cool.
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.
Avoid the next call-out bill
A cover plan would handle faults like L65: no call-out fees, no surprise bills.
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