How much does it cost to fix Remeha error code b26?

Typical repair cost for the Remeha b26 fault is £80-250 including labour.

b26 High

Remeha b26 Fault Code

Q: What does the Remeha b26 fault code mean?

Your boiler has detected that there is not enough water in the system or the water is not moving around properly to keep it running safely.

Also written as B26 — same fault.

The Remeha b26 fault code means: your boiler has detected that there is not enough water in the system or the water is not moving around properly to keep it running safely.. It appears on 2 Remeha models in our database.

Technical description: Low water pressure or no water flow

Typical repair cost £80-250 (including labour)

DIY fix possible

Locate the pressure gauge on the boiler or pipework to check if it is below 1 bar.Locate the filling loop (a flexible silver hose) and slowly open the valves until the pressure reaches 1.5 bar.Ensure all radiator valves and isolation valves under the boiler are fully open.Press the 'Reset' button on the control panel to restart the boiler.

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Remeha models that show the b26 fault code

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

Source

Remeha b26 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.

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