Low
ECO-button flashes on Worcester Bosch ZB 7 27 HE

Your boiler has encountered a minor operational hiccup and needs a simple manual restart to clear the error.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

Fault Condition - press and hold-in to reset the appliance.

From this model's manual
Verified against the Worcester Boiler Zb 7 27 He System installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Locate the ECO button on the front control panel of your boiler.Press and hold the ECO button firmly for approximately 5 to 10 seconds.Release the button and wait for the light to stop flashing, indicating the boiler has reset and is ready to operate.

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