High
E193 on Baxi Duo-tec Combi HE

Your boiler is struggling to get water moving through the system to prepare for heating, which usually means the system is failing to detect that the pump is starting up correctly.

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 system (temporary fault)

From this model's manual
Verified against the Baxi Duo Tec Combi Ga installation & service manual, page 46.
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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