Jacuzzi Temperature Sensor for LED J-330, J-335, J-340, J-345

Temperature Sensor for Jacuzzi J-330, J-335, J-340 and J-345 built from 2002 to 2016

This Sensor

  • 6600-166 Temp Sensor with curled end connectors for LED Systems
  • Includes New O-Ring

Common Sensor Error Codes

  • "SN-2" refers to a non-functional temperature sensor.
  • "SN-1" refers to a non-functional Hi Limit sensor.
  • Three dashed lines ("watchdog") is almost always corrected by replacing the temperature sensor.
  • Rapidly changing temperature or wildly inaccurate displays are almost always fixed by replacing the temperature sensor.
  • Consider replacing the Hi Limit sensor as well as it can also cause the dashed lines "watchdog" error code

Click here for instructions on how to replace the temperature sensor in your spa


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  • Model: 6600-166
  • Manufactured by: Jacuzzi Hot Tubs

Manufacturer Info