BoilerFaultCodesYour boiler has detected an issue with the cold water arriving at the unit, meaning it cannot safely heat water for your taps or shower.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Cold water fault inlet pipe
What causes this fault?
This fault occurs when the boiler cannot detect a consistent flow or pressure of cold water entering the system. The most common reason is a blockage caused by grit or debris in the inlet filter, or a mechanical failure of the internal turbine that monitors water movement.
DIY fix possible
Check that the main water stopcock in your home is fully open.Ensure any isolation valves on the pipework leading to the boiler are turned to the 'on' position.Check with your local water provider to see if there is a supply outage or burst pipe in your area.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like G2 — no call-out fees, no surprises.
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Worcester Bosch WR325 RSF is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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