Low
d5 on Alpha Eco 11 13

Your boiler is simply displaying the temperature setting you have chosen for your hot water, rather than indicating a technical fault.

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

Domestic hot water set point temperature °C

From this model's manual
Verified against the Alpha Eco installation & service manual, page 23.
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

Check your boiler display manual to confirm this is a status code rather than an errorPress the reset button only if the boiler has stopped working entirelyAdjust your hot water temperature dial if you wish to change the current setting

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