E430 + Flame crossed High
Your boiler has detected that the water pressure is too low or not circulating correctly to operate safely.
Technical description: Water pressure test failed
Typical repair cost: £0-120 (including labour)
DIY fix possible
Check the pressure gauge on the front of the boilerIf the pressure is below 1.0 bar, use the filling loop handles to top it up to 1.5 barOnce the pressure is corrected, press the 'Reset' button
Protect yourself from future repair bills
A boiler cover plan would cover faults like E430 + Flame crossed — no call-out fees, no surprises.
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Parts commonly replaced
- External filling loop
- Expansion vessel
- Water pressure sensor
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