E10 error code appears; spa may not heat and temperature reading may be frozen or show dashes.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Unplug the spa before inspecting sensor wiring. Avoid using the spa in freezing conditions without proper freeze protection.
- Check ambient conditions: If the spa is used in very cold weather, ensure the pump/heater unit is not exposed to direct freezing wind and is within the operating temperature range specified by SaluSpa.
- Power reset: Unplug the spa for 10 minutes, then reconnect and see if the error clears.
- Inspect sensor cable (if visible): Some models have an external ambient sensor lead. Check for cuts, pinches, or rodent damage.
- Relocate unit: Move the pump/heater unit slightly away from extremely cold surfaces or snow/ice buildup that could shock the sensor.
- Persistent E10: If the error remains in normal ambient temperatures, the ambient sensor or main PCB is likely faulty and may require replacement of the sensor harness or entire pump/heater unit.
Warning: Do not attempt to bypass freeze protection features; they help prevent serious damage to the spa in cold weather.
Repair Difficulty
Required Part
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