CDA Earth Leakage / Insulation Fault

Washer intermittently trips the household RCD (residual current device) during operation.

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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

Heater element insulation breakdown, Damaged wiring touching chassis, Moisture on motor or PCB, Faulty mains filter

How to Fix / Troubleshooting

Safety first: Do not repeatedly reset an RCD that keeps tripping; identify and fix the fault first.

Step-by-step checks:

  • Isolate washer: Confirm that the RCD only trips when the CDA washer is in use.
  • Test heater to earth: With the machine unplugged, disconnect heater wires and measure resistance from each terminal to chassis. Low resistance indicates leakage—replace the heater.
  • Inspect wiring: Look for crushed or abraded cables, especially around the heater, motor, and pump. Repair or replace as needed.
  • Check for moisture: Inspect the base and PCB area for leaks. Fix any leaks before replacing components.
  • Professional testing: If the cause is not obvious, an insulation resistance test by a qualified technician is recommended.
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Repair Difficulty

Professional Required 5/5

Required Part

Heating Element
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