--- product_id: 531362472 title: "XMK 6600-166 Temperature Sensor for Sundance Spas and Jacuzzi Hot Tubs, with Curled Finger Connectors and 6540-228 O-Ring" brand: "xmk" price: "120.49 DT" currency: TND in_stock: true reviews_count: 13 category: "Xmk" url: https://www.desertcart.tn/products/531362472-xmk-6600-166-temperature-sensor-for-sundance-spas-and-jacuzzi store_origin: TN region: Tunisia --- # Easy DIY install Wide spa compatibility Precise temp sensing XMK 6600-166 Temperature Sensor for Sundance Spas and Jacuzzi Hot Tubs, with Curled Finger Connectors and 6540-228 O-Ring **Brand:** xmk **Price:** 120.49 DT **Availability:** ✅ In Stock ## Summary > 🌊 Stay chill, stay connected — the ultimate spa temp sensor upgrade! ## Quick Answers - **What is this?** XMK 6600-166 Temperature Sensor for Sundance Spas and Jacuzzi Hot Tubs, with Curled Finger Connectors and 6540-228 O-Ring by xmk - **How much does it cost?** 120.49 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/531362472-xmk-6600-166-temperature-sensor-for-sundance-spas-and-jacuzzi) ## Best For - xmk enthusiasts ## Why This Product - Trusted xmk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Installation:** 12-foot wiring and simple cut-and-tape method make replacement a breeze—no pro needed. - • **Error-Free Spa Experience:** Eliminates annoying 'Watchdog' and '----' error codes, so your relaxation stays uninterrupted. - • **Universal Spa Compatibility:** Fits a broad range of Sundance and Jacuzzi models from 1998 to present—future-proof your soak. - • **Precision Temperature Control:** Accurately monitors water temp to keep your spa perfectly heated. - • **Durable Design with O-Ring Seal:** Includes 6540-228 O-Ring for leak-proof, long-lasting performance under spa conditions. ## Overview The XMK 6600-166 Temperature Sensor is a high-precision replacement part designed for a wide range of Sundance and Jacuzzi hot tubs. Featuring curled finger connectors and a durable 6540-228 O-Ring, it ensures accurate water temperature readings and eliminates common error codes. With a 12-foot wire for easy installation, this sensor is the go-to fix for maintaining your spa’s optimal performance and comfort. ## Description 6600-166 Temp Sensor for Jacuzzi and Sundance Spas with Curled Finger Connectors and 6540-228 O Ring Spas hot tub temperature sensor helps solve your water temp problem and clear "Watchdog" error and "---" error. A great replacement parts to saved a lot just by replacing the temperature sensor. Temperature Sensor Fits These Sundance Spas Models: 2012+ 680 Peyton(04/2012+) 2011+ Select Series: Constance and Victoria 2008+ Camden, Chelsee, Certa, Denali, Tacoma, Hawthorne, Hartford, Hamilton, Dover 2008-2012 Burlington 2007+ Hamilton, Chelsee, Certa and Camden, Montclair and Dover 2007 Metro, Solo, Burlington, Denali, Tacoma 2006 Caprio, Palermo, Bahia and Cayman Metro, Solo, Burlington, Denali, Tacoma 2005 Sweetwater, Del Sol and 850E Series: Lagunas, Cayman, Bahia, Palermo, Solo, Metro, Caprio 1998-2004 Sweetwater Series and Portofino Series: Aspen, Austin, Bahia, Caprio, Caprio ST Cayman, Cheyenne, Hartford, Lagunas, Madison, Metro, Olympia, Palermo, Solo, Tango, Vail All Lx-10 and LX-15 Systems used by Sundance Spas : 1998: Vail, Olympia, Madison, Hartford, Cheyenne, Austin, Aspen All 1998-2007 701, 724 Systems (with curled Finger Connectors) Winchester, Kensington Spas (with curled finger connections) No longer used on 780 systems after 04/2017+ Used on All: Austin, Aspen, Bali, Bahia, Burlington, Caprio, Cayman, Camden, Certa, Chelsee, Cheyenne, Denali, Dover, Hamilton, Hartford, Hawthorne, Lagunas, Madison, Metro, Palermo, Solo, Tacoma, Vail Used on these 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 Temperature Sensor fits these Jacuzzi Spas Models: 2007+ J-270, J-280, J-355, J-365 and J-375 Models 2005+ J-210, J-220 and J-230, J-200 LED Models 2005-2007 J-325 Models 2004+ J-335, J-345 Models 2003-2005 Del Sol Models 2002-2003 J-320, J-330, J-340 Models 2002+ J-300 Easy Installation The Temp Sensors are located in the filter compartment on the side. They are unscrewed from the inside of the tub and the wire is fed through the tub into the equipment compartment. Follow the wire to the PC Board. To feed the new sensor, drain the tub below the hole and pull the old sensor out a couple of feet into the tub, cutting the old sensor head off, tie on the new sensor (connector end) to the old wire and pull the wire through into the equipment compartment. The connectors on the Temp Sensor are attached to a pc board connector that is located on the PC Board (usually at the top). There are other wires connected to this plug: Jumper interlock wire,Flow Switch, High Limit and Temp sensor. Remove the pin connector from the board Package Include 1 x 6600-166 Spa Temperature Sensor with Curled Finger Connectors 1 x 6540-228 Rubber Gasket Review: Perfect fit. - Priced right, fit perfect and works flawlessly. Review: Perfect replacement for my Jacuzzi hot tub! - This was exactly what I needed when the thermostat on my hot tub stopped working. Easy to install and wire. Worked exactly as it should when I got the Jacuzzi refilled and running again. No problems since installation. ## Features - Compatibility: 6600-166 spa temperature sensor with curled finger connectors compatible with Sundance Spas and Jacuzzi Hot Tub, include 6540-228 spa sensor O-Ring. - Temperature Sensor for Jacuzzi Hot Tub Models: All J300-J365 tubs use the 6600-066 curled finger sensor, 2007+ J-270, J-280, J-355, J-365 and J-375 Models 2005+ J-210, J-220 and J-230, J-200 LED Models 2005-2007 J-325 Models 2004+ J-335, J-345 Models 2003-2005 Del Sol Models 2002-2003 J-320, J-330, J-340 Models 2002+ J-300. - Temperature Sensor for Sundance Spas Models: 2012+ 680 Peyton, 2011+ Select Series 2008+ 680 Denali, Tacoma; 780 Dover 2008-2012 680 Burlington model with or without a Circ Pump 2007+ Hamilton, Chelsee, Certa and Camden 2007 Metro, Solo, and 680 Models 2006 Caprio, Metro, Solo, and 680 Models 2006 Palermo, Bahia and Cayman 2005 850E Models 2005 780, Sweetwater and Del Sol Models (with curled finger connections). - Temp Sensor for Sundance Spas Models: 1998-2004 Sweetwater Series and Portofino Series: Caprio, Metro and Solo.All Lx-10 and LX-15 Systems used by Sundance All 1998-2007 701, 724 Systems (with curled Finger Connectors) Winchester, Kensington Spas Replaces 6600-070, 6600-071 6600-104. Used on All: Bahia, Burlington, Caprio, Cayman, Camden, Certa, Chelsee, Denali, Dover, Hamilton, Hartford, Hawthorne, Metro, Palermo, Solo, Tacoma. - Solve Water Temp Problem: The hot tub temperature sensor helps fix watchdog error display of " - - - - " on your spa hot tub. - Easy Installation: Cut off old temp sensor in the hot tub and tape old wire to new spa temp sensor wire to feed through back to control board. - Hot tub temp sensor comes with 12 foot wires which long enough to go from the sensor location to the control box. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0C4PFZFXJ | | Best Sellers Rank | #77,287 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,176 in Pool & Spa Replacement Parts | | Customer Reviews | 4.4 4.4 out of 5 stars (104) | | Item Weight | 5.3 ounces | | Item model number | 6600-166 | | Manufacturer | XMK | | Product Dimensions | 6.1 x 4 x 1.6 inches | ## Images ![XMK 6600-166 Temperature Sensor for Sundance Spas and Jacuzzi Hot Tubs, with Curled Finger Connectors and 6540-228 O-Ring - Image 1](https://m.media-amazon.com/images/I/61TT1OOgbUL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect fit. *by K***R on March 26, 2026* Priced right, fit perfect and works flawlessly. ### ⭐⭐⭐⭐⭐ Perfect replacement for my Jacuzzi hot tub! *by C***D on September 19, 2025* This was exactly what I needed when the thermostat on my hot tub stopped working. Easy to install and wire. Worked exactly as it should when I got the Jacuzzi refilled and running again. No problems since installation. ### ⭐⭐⭐⭐ Great replacement *by S***S on January 30, 2026* Worked great in my Sundance Denali spa ## Frequently Bought Together - XMK 6600-166 Temperature Sensor for Sundance Spas and Jacuzzi Hot Tubs, with Curled Finger Connectors and 6540-228 O-Ring - XMK Flow Switch Replacement for Q-12DS-C2, Flow Switch for Sundance Spas, Jacuzzi Hot Tub and Sweetwater Spas, Replace Part# 2560-040 - XMK Temperature Sensor for Sundance Spa and Jacuzzi Hot Tub, Heat Temp Sensor for Jacuzzi and Sundance Spas Hot Tub Replace Part# 6600-167, 12' with Box End Connector and 6540-228 O-Ring --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/531362472-xmk-6600-166-temperature-sensor-for-sundance-spas-and-jacuzzi](https://www.desertcart.tn/products/531362472-xmk-6600-166-temperature-sensor-for-sundance-spas-and-jacuzzi) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-08*