BoilerFaultCodesYour boiler has detected that there is not enough water circulating through the system or there is air trapped in the internal pump.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: pump has run dry
What causes this fault?
This fault occurs when the boiler's internal sensors detect that the pump is spinning without a sufficient flow of water. The most common reasons are a loss of system pressure, a build-up of air within the unit, or a mechanical failure of the pump motor itself.
This issue often appears in autumn when the heating is turned back on for the first time, as pumps can seize or trap air after sitting idle over the summer.
DIY fix possible
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is low, use the filling link to top up the system with water.Reset the boiler by holding the reset button for three seconds.Ensure all radiator valves are open and not blocked by air.
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A boiler cover plan would cover faults like A1 — no call-out fees, no surprises.
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Worcester Bosch RD 532i RD 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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