6600-166 Temperature Sensor with Curled Finger Connectors Fit for Sundance Spas and Jacuzzi Hot Tubs. (6600-166) Product Feature: Application: This Temperature Sensor fits for the following Circuit Boards: 6600-720 6600-726 6600-722 6600-724 6600-286 6600-287 6600-288 6600-289 6600-082 6600-084 6600-086 6600-087 6600-088 6600-089. Replacement part number: 6600-070 6600-071 6600-104. Function: A defective temperature sensor might cause the problem of rapidly changing temperature or wildly inaccurate displays. Replacing the temperature sensor can help fix the problem and ensure proper operation of your hot tubs. 12 Feet Length: It is long enough to go from the sensor location to the control box. When installing cut the sensor head off tape the new sensor wire to the old wire and pull it all the way through. Package Includes: Comes with a 6600-166 Temperature Sensor. 6540-228 O-rings are not included. Satisfaction Guarantee: If you re not satisfied with the product simply return it for a full refund in 30 days. We support 30-day full refund for return and 12 month s warranty.