BoilerFaultCodesYour boiler has detected that the water pressure inside the system is critically low, so it has safely shut itself down to prevent damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Lock out
DIY fix possible
Locate the external filling loop, usually two silver valves linked by a braided metal hose under the boiler.Slowly open the valves to let water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly and reset the boiler.
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 6.4.3 Water level control — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Remeha Quinta 30 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.
Affiliate links — we may earn a commission at no extra cost to you.