{"product_id":"thermistor-79005-high-limit-79006-control-sensor-kit-spa-heater","title":"Thermistor 79005 High-Limit \u0026 79006 Control Sensor Kit - Spa Heater","description":"\u003cp\u003eIn this review the Thermistor 79005 high-limit and 79006 control sensor kit is evaluated for spa owners who need a reliable replacement for Watkins No Fault and PDR heaters. The bottom line: this kit is best for technicians and DIYers who want a direct, updated replacement that restores proper temperature sensing and safety shutdowns. The review focuses on fitment, function and installation so you can decide whether the Camoo kit meets your spa maintenance needs.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerfect fitment:\u003c\/strong\u003e The kit is designed to fit No Fault Heater and PDR Heater housings and is compatible with Hot Spring, Limelight and Tiger River models from 2002 to 2023, simplifying part selection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgrade design:\u003c\/strong\u003e Newly designed thermistors include O-rings and an updated part number (34-01395-K) to replace obsolete parts and improve sealing at the heater port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-function sensors:\u003c\/strong\u003e The 2-pin high-limit sensor shuts down the heater if outlet water exceeds 118 degrees F while the 4-pin control thermistor reports water temperature to the motherboard for accurate regulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement:\u003c\/strong\u003e The sensors screw into the Watkins No Fault Heater housing and plug into the IQ 2020 control box motherboard, making the swap straightforward for anyone comfortable with basic spa service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety emphasis:\u003c\/strong\u003e Including both the high-limit and control thermistors in one kit maintains system safety and avoids mismatched parts that could bypass temperature protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty and returns:\u003c\/strong\u003e The item includes a 30-day return promise and a 12-month warranty, offering buyers a low-risk purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is ideal for spa owners and service technicians maintaining Hot Spring, Limelight, Tiger River and compatible models who need a direct replacement for failed thermistors or want to preempt heater shutoffs. It particularly suits anyone replacing obsolete 39204, 39205, 39525 or 39530 parts and who values a sealed O-ring design and plug-and-play connection to IQ 2020 controls.\u003c\/p\u003e\u003cp\u003eNot recommended for owners of non-compatible heater housings or systems that do not use Watkins No Fault or PDR heater form factors; those users should confirm heater model compatibility before purchase or consult a professional for alternate sensor solutions.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect fit for a wide range of Hot Spring and Tiger River models, reducing installation guesswork.\u003c\/li\u003e\n\u003cli\u003eIncludes both high-limit and control thermistors so temperature sensing and safety are restored together.\u003c\/li\u003e\n\u003cli\u003eO-ring upgrade improves sealing where the sensor threads into the heater housing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLimited to compatible heater housings and IQ 2020 control connections, so it will not work on unrelated systems.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded sensors\u003c\/td\u003e\n\u003ctd\u003e2-pin high-limit (79005) and 4-pin control (79006)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplaces\u003c\/td\u003e\n\u003ctd\u003e39204, 39205, 39525, 39530\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible brands\/models\u003c\/td\u003e\n\u003ctd\u003eHot Spring, Limelight, Hot Spring pre 89, Tiger River (2002-2023)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003e34-01395-K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety function\u003c\/td\u003e\n\u003ctd\u003eHigh-limit shuts heater above 118 degrees F; control measures water temp to motherboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eScrews into Watkins No Fault Heater housing and plugs into IQ 2020 motherboard (hand tight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e30-day returns and 12-month warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Thermistor 79005\/79006 kit is a practical, cost-effective solution for anyone needing an exact replacement for Watkins No Fault and PDR heater thermistors. It restores both temperature measurement and high-limit safety with an improved O-ring design, and its direct plug-in compatibility with IQ 2020 controls makes installation straightforward. For compatible Hot Spring and Tiger River owners this kit is a sensible maintenance purchase that delivers good value.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDo these sensors fit my Hot Spring spa?\u003c\/strong\u003e\u003cbr\u003eThey fit Hot Spring, Limelight and Tiger River models listed from 2002 to 2023 and replace the obsolete part numbers named, but always confirm your heater is a Watkins No Fault or PDR style before buying.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install them without tools?\u003c\/strong\u003e\u003cbr\u003eThe sensors screw in by hand (hand tight only) to the heater housing and plug into the IQ 2020 motherboard, so basic mechanical ability is sufficient; take care to replace both sensors together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the high-limit sensor do?\u003c\/strong\u003e\u003cbr\u003eThe 2-pin high-limit thermistor signals the system to shut down the heater if the outlet water temperature exceeds 118 degrees F to protect the spa and equipment.\u003c\/p\u003e","brand":"Camoo","offers":[{"title":"Default Title","offer_id":48632643027163,"sku":"B0D1MZZLQ8","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71umTizZsGL._AC_SL1500.jpg?v=1778524975","url":"https:\/\/gearmusthave.com\/products\/thermistor-79005-high-limit-79006-control-sensor-kit-spa-heater","provider":"GearMustHave","version":"1.0","type":"link"}