Heater displays E07 and will not operate; may be associated with very low or no water flow.

Safety: Turn off power and close the cold water isolation valve before opening any water connections.

Steps:

• Check water pressure: Open a nearby cold tap to confirm good mains pressure. If pressure is low, contact your water supplier.
• Clean inlet filter: Close the cold inlet valve to the heater. Remove the inlet union and clean the mesh filter inside the Baxi inlet assembly. Rinse debris and reinstall.
• Inspect flow sensor/turbine: On many Baxi water heaters, the flow sensor is integrated into a plastic water block. Remove the sensor/turbine assembly and check for limescale or debris. Clean gently and ensure it spins freely.
• Check wiring: Ensure the flow sensor connector is firmly attached to the control PCB.

Professional: If E07 remains, the flow sensor or water block may need replacement, which is best done by a qualified technician to avoid leaks.