BoilerFaultCodesYour boiler has lost water pressure or cannot move water around the system, which has caused it to stop working for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Poor/No circulation
What causes this fault?
This fault occurs when the boiler detects that there is either not enough water in the system or the water is not moving through the pipes as it should. The most common reason is a drop in water pressure due to a minor leak, but it can also happen if the internal pump has seized or becomes blocked with debris.
This issue often appears when you turn your heating back on for the first time in autumn, as pumps can seize after being inactive throughout the summer.
DIY fix possible
Check the pressure gauge on the front of the boiler or under the casing.If the needle is below 1 bar, locate the filling loop (braided silver hose) under the boiler.Slowly open the valve(s) until the pressure reaches 1.5 bar, then close them tightly.Restart the boiler to see if the fault clears.
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E10 — no call-out fees, no surprises.
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Baxi Avanta 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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