Low
FP 1 0 on Ideal GB24 / GB30

Your boiler is perfectly fine and is simply staying active to prevent the internal pipes from freezing during cold weather.

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

The boiler is operating in frost protection. Note that after the boiler has reached temperature it will show dH for 60s whilst it also protects the DHW circuit.

From this model's manual
Verified against the Ideal Gb24 Gb30 installation & service manual, page 6.
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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