How much does it cost to fix Keston error code E 44?

Typical repair cost for the Keston E 44 fault is £80-150 including labour.

E 44 High

Keston E 44 Fault Code

Q: What does the Keston E 44 fault code mean?

Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.

Also written as E44 — same fault.

The Keston E 44 fault code means: your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.. It appears on 3 Keston models in our database.

Technical description: Low water pressure

Typical repair cost £80-150 (including labour)

DIY fix possible

Locate the external filling loop, usually two silver valves connected by a braided metal hose underneath the boiler.Gradually open the valves to let mains water into the system until the pressure gauge on the front reads between 1.0 and 1.5 bar.Close both valves firmly and check for any visible leaks around your radiators or pipework.

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Keston models that show the E 44 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Keston E 44 fault code information on this page is sourced and cross-checked against the official Keston service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026