Temperature Sensor for Sundance Spa Hot Tubs, Replacement Temp Sensor for Outdoor Pool and Spa Systems, Model 6600-166 Compatibility: This temperature sensor is a replacement part designed for use with various Sundance spa models. It is compatible with J-270, J-280, J-355, J-365, and J-375 models (2007+), J-210, J-220, and J-230 models (2005+), J-200 LED models, J-325 models (2005–2007), J-335 and J-345 models (2004+), Del Sol models (2003–2005), and J-320, J-330, J-340 models (2002–2003). Also fits (2012+), 880 Systems (2005+), 850 Systems (1997–2005), 400, 600, 600-S, 750, 800, and 850 Systems. Compatible with Suncoast (1992), Suntub SVDV Systems (496–498), and 850 Systems (1997+). Replaces part numbers 6600-138 and 6600-105. Interchangeable with 6600-182 sensor (stainless steel) with box end connectors. For inground spas without a skirt, refer to model 6600-169. Function: This spa temperature sensor is essential for resolving common error codes such as OH or ICE on your hot tub display. It ensures accurate temperature readings and reliable operation of your spa heating system. Easy Installation: Simply disconnect the old sensor and connect the new one by splicing the wires and securing them properly. Route the wire back to the control board for proper installation. Specifications: Part Name: Temperature Sensor Model: 6600-166 Material: Plastic housing with stainless steel probe Color: Black Package Includes: 1 x Temperature Sensor Note: The actual product color may vary slightly due to lighting and screen display differences. Allowable measurement variation is ±1–3 cm.