High Lockout
LCB on Ideal HP290

Your heat pump has encountered a communication or power issue with the internal electronics that manage the motor, causing the system to stop working.

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.

Technical description

Inverter Error

What causes this fault?

This fault occurs when the main control system loses its ability to talk to the part that regulates the heat pump's motor speed. The most common reason is a hardware failure within the inverter circuit board or a loose connection in the wiring that carries signals between these internal components.

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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