Medium
61 on Alpha E-Tec NX

Your boiler is struggling to circulate water properly because air bubbles are trapped inside the system, preventing it from heating your home efficiently.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Air in the pump Restricted CH flow due to air or a circuit restriction

From this model's manual
Verified against the Alpha E Tec Nx installation & service manual, page 49.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check your boiler pressure gauge and top it up to 1.5 bar if it is low using the filling loopBleed all the radiators in your home starting from the lowest floor to the highestRestart the boiler and check if the error code clears

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