E08 High
Your boiler has detected that there is not enough water in the system to operate safely and has shut down to prevent damage.
Technical description: Low water pressure
Typical repair cost: £0-160 (including labour)
DIY fix possible
Locate the filling loop (usually a silver flexible hose) underneath your boiler.Slowly open the small valves at either end of the hose until you hear water entering the system.Monitor the pressure gauge and close the valves once the needle reaches between 1.0 and 1.5 bar.Reset the boiler to clear the fault code.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E08 — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop
- Expansion vessel
- Pressure relief valve
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