0.0 High
Your boiler has detected that the water pressure in the central heating system is too low to operate safely and effectively.
Technical description: Low system pressure
Typical repair cost: £0-120 (including labour)
DIY fix possible
Locate the filling loop (usually a silver flexible hose with small valves under the boiler).Slowly open the valve(s) until you hear water flowing and watch the pressure gauge.Close the valves tightly once the pressure gauge reaches between 1.0 and 1.5 bar.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 0.0 — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop
- Expansion vessel
- Pressure sensor
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