What does the Baxi 600 Series E730 fault code mean?
The E730 fault code indicates that there is low water pressure in the domestic hot water (DHW) system of the Baxi 600 Series boiler. This can lead to inadequate hot water supply and may require immediate attention to restore proper function.
Common Causes
- Low System Pressure: The pressure in the boiler may have dropped below the minimum required level, often due to leaks or insufficient water supply.
- Faulty Pressure Relief Valve: A malfunctioning pressure relief valve can cause water to escape, leading to low pressure in the system.
Can I fix it myself? (DIY)
You can attempt to restore the water pressure by locating the filling loop and carefully adding water to the system until it reaches the recommended pressure level (typically between 1-1.5 bar). If the issue persists or if you suspect a leak, it is advisable to call a Gas Safe Engineer for further inspection.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E730 fault could range from £100 to £250, depending on whether it involves simply repressurising the system or replacing a faulty component like the pressure relief valve.