Display shows E06; heater will not start or shuts down quickly

Safety first: Turn OFF power to the heater before removing panels or touching wiring.

• Locate outlet sensor: Identify the outlet (return) temperature sensor on the heater header or plumbing. Confirm it is installed in the correct port as per the Poolworld manual.
• Inspect wiring and connector: Check the sensor cable for damage and ensure the connector at the control board is fully seated. Look for signs of moisture intrusion at the connector.
• Dry and clean: If moisture is present, dry the area thoroughly and use contact cleaner on the connector. Allow to dry before reconnecting.
• Reset and test: Restore power and call for heat. If E06 persists, replace the outlet temperature sensor with the correct Poolworld part.

Warning: Incorrect sensor readings can cause the heater to overheat or short-cycle; do not bypass sensors.