BoilerFaultCodesIdeal ERROR CODE 3 Fault Code
Also written as ERRORCODE3 — same fault.
The Ideal ERROR CODE 3 fault code means: your boiler has detected an issue with the air pressure or water flow sensors, preventing it from firing up for safety.. It appears on 2 Ideal models in our database.
Technical description: WPS / PPS ALARM
What causes the Ideal ERROR CODE 3 fault?
This fault occurs when the boiler's internal sensors detect that either the water pressure is too low or the fan isn't moving air through the system correctly. For safety reasons, the boiler will refuse to ignite if it cannot confirm that water is flowing and harmful exhaust gases are being safely vented away. The most common reasons are a leak in the central heating system causing a drop in pressure, or a physical blockage in the air tubes or flue.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the ERROR CODE 3 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal ERROR CODE 3 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 27 April 2026