Low
d.80 on Glow-worm Energy7 Combi

This code is simply an information display showing the total time your boiler has been actively running your radiators, rather than an indication of a fault.

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

Running time in heating mode

From this model's manual
Verified against the Glow Worm Energy7 Combi installation & service manual, page 50.
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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