High
61 on Alpha E-Tec Regular

Your boiler is struggling because there is trapped air inside the system, which is preventing hot water from circulating properly to your radiators.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely 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 Regular installation & service manual, page 47.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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