BoilerFaultCodesAriston EE0022 Fault Code
The Ariston EE0022 fault code means: your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.. It appears on 1 Ariston model in our database.
Technical description: Insufficient water pressure
DIY fix possible
Locate the external filling loop, which is usually a flexible silver braided hose connecting two pipes under the boilerOpen the small valve or tap on the loop to let water in until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 barClose the valve tightly once the pressure is correct
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Gas Safe Register →Ariston models that show the EE0022 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ariston EE0022 fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026