Control panel displays E02 and heating stops

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

Defective NTC temperature sensor, Loose sensor connection, Damaged sensor cable, Faulty control PCB

Safety first: Unplug the spa before accessing the heater pump unit.

1. Reset and test:
- Unplug for 10 minutes, then reconnect and test heating.
2. Check water temperature:
- Use an external thermometer to confirm actual water temperature.
3. Inspect sensor wiring (advanced):
- Open the heater pump housing and locate the sensor leads.
- Ensure connectors are fully seated and not corroded.
If E02 remains: Replace the temperature sensor or heater pump unit via a qualified technician.

Hard 4/5

Water Temperature Sensor (NTC Probe)

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