270 Low

Worcester Bosch 270 Fault Code

The Worcester Bosch 270 fault code means: your boiler is currently increasing its power to meet the demand for heating or hot water, which is a normal operational activity rather than a system failure.. It appears on 20 Worcester Bosch models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: The boiler is modulating upwards

What causes the Worcester Bosch 270 fault?

This code appears when the boiler needs to generate more heat to reach the temperature requested by your thermostat or hot water taps. It is a sign that the internal burner is simply ramping up its intensity to meet the current demand. It does not indicate a system failure or a broken part.

DIY fix possible

No action is required as this code is an operational status indicator.Monitor the display to see if the code clears once the temperature stabilizes.If the boiler appears stuck on this code without producing heat, try a simple reset.

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Worcester Bosch models that show the 270 fault code

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

Source

Worcester Bosch 270 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