No code 213 Medium

Worcester Bosch No code 213 Fault Code

Also written as NOCODE213 — same fault.

The Worcester Bosch No code 213 fault code means: your boiler is struggling because the water leaving the heater is much hotter than the water returning from your radiators, indicating a lack of flow through your heating system.. 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: Temperature difference between supply and return exceeding limit
Typical repair cost £120-250 (including labour)

DIY fix possible

Check that all radiator valves (TRVs) are fully open to allow water to circulate freelyEnsure your system pressure is at the correct level, typically between 1 and 1.5 barBleed all radiators in the house to remove trapped air that may be blocking the flow

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Worcester Bosch models that show the No code 213 fault code

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

Source

Worcester Bosch No code 213 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