BoilerFaultCodes.com
b26 High

Your boiler has stopped working because it cannot detect enough water circulating inside the system.

Call an engineer soon

Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Low water pressure or no water flow
Typical repair cost £80-150 (including labour)

DIY fix possible

Locate the filling loop (usually a silver braided hose with one or two valves) connected to the boiler pipework.Slowly open the valve(s) to allow water to enter the system while watching the pressure gauge on the front of the boiler.Fill until the needle sits in the green zone, typically between 1.0 and 1.5 bar, then tightly close the valve(s).

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