Pump intermittently stops and shows E09, especially in damp environments
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Immediately switch off the pump at the breaker and do not attempt to restart until the fault is investigated. Risk of electric shock.
- Inspect for water ingress: Check around the cable gland, terminal box, and motor housing for signs of water, rust, or condensation.
- Dry the area: If minor moisture is present, dry the terminal box and ensure the cable gland is tight and properly sealed. Allow the motor to dry for 24–48 hours in a dry environment.
- Insulation test (if equipped): A qualified technician can perform a megger test between windings and earth to confirm insulation resistance.
- Check RCD/GFCI: Ensure the residual‑current device is functioning correctly and not nuisance‑tripping due to wiring issues in the pool system.
Persistent E09 indicates internal insulation failure; the safest solution is to replace the motor assembly.
Repair Difficulty
Required Part
We may earn a commission from links on this page.