E14
Amfa4000
Position Sensor / Encoder Fault
E14 displayed and the Amfa4000 cannot detect the rotor/cam home position
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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
Failed cam position sensor on Amfa4000 valve, Misaligned cam or rotor disc, Broken sensor wiring, Debris between sensor and magnet
How to Fix / Troubleshooting
Safety first: Isolate power and water. Place the unit in bypass to maintain household supply.
- 1. Access the valve head: Remove the control cover to expose the cam/rotor and position sensor assembly.
- 2. Inspect sensor alignment: Ensure the sensor is correctly positioned relative to the cam magnet or encoder wheel. Adjust mounting screws if it has shifted.
- 3. Clean sensor area: Use a dry, soft brush or compressed air to remove any iron filings, scale, or debris between the sensor and magnet.
- 4. Check wiring: Verify the sensor harness is intact and firmly connected to the control board.
- 5. Manually index the valve: If allowed by the Amfa4000 service procedure, manually rotate the cam to the home position and then power up to let the controller re-learn the position.
If E14 remains after alignment and cleaning, replace the cam position sensor or the entire valve head assembly.
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Repair Difficulty
Hard
4/5
Required Part
Amfa4000 Cam Position Sensor
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