Low
d.01 on Glow-worm Flexicom 24c / 28c

This code indicates your boiler is performing a routine process where it continues to move water around the system for a few minutes after the heating has switched off to cool down safely.

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

Pump overrun time in heating mode

From this model's manual
Verified against the Glow Worm Flexicom 24c 28c installation & service manual, page 43.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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