E6 error appears randomly; pump may start and stop unexpectedly.

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

Corrupted firmware in Hurlcon variable-speed drive, Electrical noise on control lines, Failing control PCB, Poor earthing

Safety: Turn off power before touching internal electronics.

Hard reset: Disconnect power for at least 10 minutes to fully discharge capacitors, then restore power.
Check earth: Ensure the pump and controller are properly earthed to reduce electrical noise.
Isolate from other devices: Temporarily disconnect external control inputs (automation systems, timers) and run the pump standalone.

If E6 continues, the Hurlcon drive may require firmware reflash or replacement, which must be done by an authorized service agent.

Professional Required 5/5

Hurlcon variable-speed drive PCB

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