BoilerFaultCodesIdeal Low Pressure Error Fault Code
Also written as LOWPRESSUREERROR — same fault.
The Ideal Low Pressure Error fault code means: your boiler has detected that there is not enough water in the system to operate safely, causing it to shut down to prevent damage.. It appears on 1 Ideal model in our database.
Technical description: Low Pressure Error
What causes the Ideal Low Pressure Error fault?
This fault occurs when the water pressure inside your heating system drops below the minimum level required for the boiler to pump heat around your home. The most common reasons for this are a leak somewhere in your radiators or pipework, or recent maintenance where air was bled from the system without topping the water back up.
This issue is frequently seen in autumn when homeowners turn their heating back on for the first time and find that pressure has naturally seeped out over the summer months.
DIY fix possible
Locate the filling loop (a flexible silver hose) underneath or near the boiler.Open the one or two taps on the loop slowly until you hear water flowing.Watch the pressure gauge until it reaches 1.5 bar, then close the taps tightly.Press the Reset button on the boiler display to clear the error.
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Gas Safe Register →Ideal models that show the Low Pressure Error fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal Low Pressure Error 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