BoilerFaultCodesVokera Low-pressure Fault Code
Also written as LOWPRESSURE — same fault.
The Vokera Low-pressure fault code means: your boiler has stopped working because the water pressure inside the system has dropped too low to allow it to run safely.. It appears on 3 Vokera models in our database.
Technical description: Insufficient system water pressure (min. 0.5 bar) prevents the pump and fan from operating.
What causes the Vokera Low-pressure fault?
This fault occurs when the water level inside your central heating system drops below the minimum required for the boiler to operate. The most common reasons are a slow leak from a radiator valve or pipework, or the air pressure inside the expansion vessel needs recharging. In some cases, it can also happen after you have recently bled your radiators, which removes air but also lowers the overall system pressure.
This issue is frequently seen in autumn when homeowners turn their heating back on for the first time after summer, revealing pressure drops that occurred while the system was idle.
DIY fix possible
Locate the filling loop (usually a silver flexible hose) underneath the boiler.Slowly open the one or two small valves on the ends of the pipe until you hear water flowing.Watch the pressure gauge and close the valves tightly once the needle reaches between 1 and 1.5 bar.
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Gas Safe Register →Vokera models that show the Low-pressure fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera Low-pressure fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026