Safety: Disconnect power at the breaker before opening the control housing.

Inspect for moisture: Remove the control cover on the Waterway pump and look for signs of water, condensation, or corrosion on the control board. Dry gently with a clean cloth and allow the unit to air dry completely.
Check gaskets and seals: Inspect the keypad gasket and control cover o‑ring for cracks or flattening. Replace if they are not sealing properly to prevent future moisture ingress.
Reseat connectors: Unplug and re‑plug the low‑voltage ribbon cable between the keypad/display and the main control board. Ensure all connectors click fully into place.
Power cycle: Restore power and perform a full power cycle by turning the breaker off for 2–3 minutes, then back on. Clear the error and test.
Board replacement: If E06 returns immediately or frequently, the inverter section of the control board is likely damaged and the entire control board assembly should be replaced.

Waterway variable‑speed pump shows E06 and stops unexpectedly during normal operation.

Possible Causes