BoilerFaultCodesIdeal ERROR CODE 8 Fault Code
Also written as ERRORCODE8 — same fault.
The Ideal ERROR CODE 8 fault code means: your boiler is unable to drain away the water it creates during normal operation, causing it to block up and stop working to prevent internal damage.. It appears on 1 Ideal model in our database.
Technical description: CONDENSATE BLOCKAGE
DIY fix possible
Locate the plastic condensate pipe exiting your home, usually found outside near the wall.Check for any visible blockages like frozen ice, leaves, or debris at the end of the pipe.If frozen, pour warm (not boiling) water over the pipe to melt the ice, then press the boiler's reset button.
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Ideal models that show the ERROR CODE 8 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal ERROR CODE 8 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