BoilerFaultCodesIdeal FP 1 0 Fault Code
Also written as FP10 — same fault.
The Ideal FP 1 0 fault code means: your boiler has detected that the water temperature has dropped too low and is automatically running to prevent the pipes from freezing.. It appears on 2 Ideal models in our database.
Technical description: The boiler is operating in frost protection.
DIY fix possible
Check that your gas supply is turned onEnsure the boiler power switch remains on so the protection can finish its cycleIf it is very cold, check that the white plastic condensate pipe leading outside isn't frozen solidOnce the boiler warms the internal water above 14°C, the code will disappear automatically
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Ideal models that show the FP 1 0 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal FP 1 0 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026