E13
Eldom Flow Sensor / Turbine Fault (Instantaneous or Hybrid Models)

Display shows E13; heater may not maintain stable temperature or may shut down under high demand.

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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

Blocked flow sensor, Damaged turbine wheel, Faulty flow sensor wiring

How to Fix / Troubleshooting

Safety: Turn off power and close water supply before opening any water connections.

Steps:

  • Locate flow sensor: On Eldom instantaneous or hybrid water heaters, the flow sensor is usually installed on the cold water inlet manifold.
  • Clean the sensor: Remove the sensor housing according to the manual. Inspect the turbine or paddle wheel for debris, scale, or damage. Rinse and clean gently.
  • Check wiring: Inspect the sensor cable and connector to the control PCB for damage or corrosion.
  • Test operation: Reassemble, open water supply, and bleed air. Restore power and check if E13 clears when water is flowing.
  • Replace sensor: If the turbine is broken or the sensor does not send pulses, replace the flow sensor assembly with an Eldom-compatible part.
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Repair Difficulty

Medium 3/5

Required Part

Eldom Flow Sensor Assembly
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