Low
d.20 on Glow-worm Easicom 24

Your boiler is simply indicating that your hot water temperature has been set to its maximum limit, and it is performing exactly as requested.

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

Maximum temperature setting for domestic hot water

From this model's manual
Verified against the Glow Worm Easicom 24 installation & service manual, page 26.
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 hot water temperature dial or buttons on your boiler control panelTurn the dial or press the button to lower the desired water temperature settingMonitor the display to see if the d.20 code disappears once the setting is reduced

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