An E01 error code is visible if there is an issue with the water flow sensors in the pool heater.

Step 1 – Check that the heater pump is set up correctly

Hose from ‘A’ to the pool heater

The arrow on the heater is facing the filter pump

Hose goes from heater into filter pump

Hose from filter pump goes into ‘B’

Step 2 – Check the filter pump

We recommend checking the filter pump troubleshooting here.

If the above steps do not fix the problem the water sensor on the heater may have broken. Please contact our Customer Care team for further support on this.