Worcester Bosch TA 211 E Fault codes & diagnostics

1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Regular Natural Gas Discontinued
Download the Worcester Bosch TA 211 E manual (German edition)The installation and service manual in German (PDF). We don't hold the UK edition yet. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Fault codes

All 1 documented codes

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AC

Your boiler is struggling to communicate with its control panel or thermostat, preventing it from knowing when to turn on your heating or hot water.

High Engineer only £150-300

Parts commonly replaced

  • Control module
  • Wiring harness
  • External thermostat/programmer
Full explanation for AC
Status & diagnostic codes

1 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

3.1 Diagnostic Your boiler is struggling to accurately read the outdoor temperature, which may cause your heating system to run inefficiently or at the wrong temperature.