SE
AquaRest Spas
General Sensor Error
Display shows SE or SENSOR ERR; spa may shut down heating and pumps intermittently.
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Safety Warning
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.
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Possible Causes
Conflicting readings between primary and secondary sensors, Loose sensor connectors, Water intrusion into sensor harness, Control board sensor circuit fault
How to Fix / Troubleshooting
Safety: Turn off power at the breaker before accessing the control pack.
- Step 1 – Inspect all sensors: Open the equipment bay and locate all temperature and high-limit sensors on the heater tube or control pack. Ensure each is firmly mounted and not physically damaged.
- Step 2 – Check connections: Unplug each sensor from the control board one at a time, inspect for corrosion or moisture, dry if needed, and reconnect securely.
- Step 3 – Power reset: Restore power and observe operation. If SE returns, identify which sensor triggers the error by temporarily swapping sensor ports (if identical) and seeing if the error follows the sensor.
- Step 4 – Replace faulty sensor: Replace the sensor that causes the error to follow it.
If SE persists with new sensors, the control board likely requires professional repair or replacement.
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Repair Difficulty
Hard
4/5
Required Part
Temperature Sensor Set
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