Jacuzzi Temperature Sensor for LED J-310, J-315, J-320, J-325

Temperature Sensor for Jacuzzi J-310, J-315, J-320 and J-325 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

You "probably" don't need to, but you might consider replacing the Hi-Limit Sensor also 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