Aquabion softener shows E13 and regeneration is inhibited due to low inlet pressure.

Safety first: Ensure all electrical work is done with power disconnected. Plumbing work should be done with valves closed and pressure relieved.

• Verify house pressure: Use a pressure gauge on a nearby tap to confirm inlet pressure meets Aquabion minimum requirements (typically 1.5–2 bar / 20–30 psi).
• Check isolation valves: Confirm that the inlet isolation valve to the Aquabion unit is fully open.
• Clean inlet screen: Shut off inlet and outlet valves. Remove the inlet union and extract the inlet filter screen. Rinse away sediment and reinstall.
• Pressure sensor check: On models with a dedicated pressure sensor, inspect the sensor port for blockage and the wiring harness for damage. Replace the sensor if readings are clearly incorrect compared to a mechanical gauge.

Warning: Do not attempt to boost pressure by altering pressure regulators without understanding your plumbing system; consult a plumber if house pressure is consistently low.