E3
Hurlcon
Flow Sensor / Pressure Switch Fault (where fitted)
Pump runs briefly then stops with E3 on the display.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Faulty Hurlcon flow switch, Stuck pressure switch, Wiring fault to sensor, Sensor installed backwards
How to Fix / Troubleshooting
Safety: Turn off power and close valves before removing any sensor from the plumbing.
- Check orientation: Verify the arrow on the Hurlcon flow switch body points in the direction of water flow.
- Inspect wiring: Ensure the sensor cable is intact and firmly plugged into the controller.
- Clean sensor: Remove the flow switch or pressure switch and gently clean any scale or debris from the paddle or diaphragm. Do not bend delicate parts.
- Bypass test (technician only): Temporarily bridge the sensor terminals to confirm if the sensor is faulty. Do not leave bypassed in normal operation.
If E3 clears when bypassed, replace the Hurlcon flow or pressure switch with an identical part.
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Repair Difficulty
Medium
3/5
Required Part
Hurlcon flow switch / pressure switch
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