No code 380 Medium

Worcester Bosch No code 380 Fault Code

Also written as NOCODE380 — same fault.

The Worcester Bosch No code 380 fault code means: your boiler is confused because the water coming into it is currently registering as hotter than the water it is trying to heat up to send to your taps.. It appears on 1 Worcester Bosch model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Inlet DHW temperature higher than the DHW outlet temperature.
Typical repair cost £120-250 (including labour)

Engineer required

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

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Worcester Bosch models that show the No code 380 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch No code 380 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026