What does the Daikin U2-01 fault code mean?

Your boiler has detected that the electrical supply coming into the unit is currently too high, which could cause damage to internal parts if left unchecked.

How much does it cost to fix Daikin error code U2-01?

Typical repair cost for the Daikin U2-01 fault is £80-250 including labour.

Daikin U2-01 Fault Code: What It Means & How to Fix It

Technical description

Supply voltage is above high limit, your boiler should continue to operate but you need to Contact a heating engineer

What causes this fault?

This fault occurs when the electrical current entering the boiler exceeds the safe operating limits required by the internal electronics. The most common reason is a power surge or a fluctuation in the local grid supply, though it can also be caused by a failing Printed Circuit Board (PCB) that is no longer able to regulate incoming voltage correctly.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Your boiler has detected that the electrical supply coming into the unit is currently too high, which could cause damage to internal parts if left unchecked.

Technical description

What causes this fault?

Engineer required

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