Medium
d.85 on Glow-worm Flexicom 24c / 28c

Your boiler has automatically increased its minimum operating power to protect itself from potential performance issues during heating or hot water production.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Increase in the min. output (heating and domestic hot water mode)

From this model's manual
Verified against the Glow Worm Flexicom 24c 28c installation & service manual, page 45.
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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Related fault codes

d.84View →d.86View →

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