BoilerFaultCodesIdeal 2P Fault Code
The Ideal 2P fault code means: your boiler is overheating because the water inside it is getting too hot too quickly, causing the system to shut down for safety.. It appears on 1 Ideal model in our database.
Technical description: Temperature of safety sensor is rising too fast.
What causes the Ideal 2P fault?
This fault occurs when the water inside the boiler heats up much faster than it can be moved away, leading to a sudden temperature spike that triggers a safety shutdown. The most common cause is a blockage or a failing pump preventing the water from circulating properly through your radiators. It can also be caused by a buildup of sludge or debris inside the heat exchanger, which restricts the flow of water.
This issue often surfaces in autumn when the heating is turned on for the first time after summer, as circulation pumps can seize or stick during long periods of inactivity.
DIY fix possible
Check that your radiator valves and TRVs are fully openEnsure the boiler pressure is between 1 and 1.5 bar on the gaugeGently bleed your radiators to remove any trapped air
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Gas Safe Register →Ideal models that show the 2P fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 2P 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