{"product_id":"high-limit-switch-42-45","title":"Astralpool Hurlcon Astralpool Heater Hi-Limit Switch - 42-45C - Inlet - F2 Errors","description":"\u003ch3\u003eAstralpool Hurlcon Astralpool Heater Hi-Limit Switch - 42-45C - Inlet - F2 Errors\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAstralpool \/ Hurlcon Threaded Hi Limit 42\/43\/45C \u003c\/strong\u003e– NC Auto Thread. For all \u003cstrong\u003eMX, HX, JX, Viron, ICI gas heaters.\u003c\/strong\u003e High Limit Switch used in all Hurlcon \u0026amp; Astralpool gas heaters. Common source of F2 error. Used on almost all pool and spa heaters. Found on the Inlet side of a gas pool or spa heater. Also called a Thermal Cutout or Thermal Safety Cutout Switch. Part Number 71030 or 71039. \u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003ePhysically Stocked, unlike most \"drop-shipping\" websites.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eShipped from VIC, NSW, WA, QLD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eThe most common reason for failure is a leaking \u003c\/span\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/astralpool-hurlcon-brass-plug-for-hi-limit-switches\"\u003ebrass plug\u003c\/a\u003e\u003cspan\u003e causing the limit switch to corrode.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNote: We are that some online sellers are illegally selling low-quality unapproved cheap switches that are non-compliant. All hi-limit switches must have DVE certification (ours do).\u003c\/p\u003e\n\u003cp\u003eThese suit all Hurlcon Astralpool HX, MX, Viron, HiNRG, JX Gas Heaters. Also suits Jacuzzi J-HN250C \u0026amp; J-HN400C \u0026amp; WWDG heaters.\u003c\/p\u003e\n\u003cp\u003eFailed hi limits can cause the F2 Errors found on Hurlcon and Astral Gas Heaters. Commonly fail due to condensation and leaks. Should be replaced every few years as part of preventative maintenance. Both Inlet \u0026amp; Outlet hi limits should be replaced at the same time.\u003c\/p\u003e\n\u003cp\u003eThere are two types, threaded (Viron, HiNRG, later HX, JX, MX) which is screwed into the brass plug, and non-threaded that is held in either by a bracket (older MX), or screws (older JX, HX).\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cb\u003eImportant Notes \u0026amp; Installation:\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAstralpool \/ Hurlcon gas heaters have a \u003cstrong\u003eseparate \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/astralpool-hurlcon-brass-plug-for-hi-limit-switches\" title=\"Hurlcon Astralpool Brass Plug\"\u003ebrass plug\u003c\/a\u003e that this hi-limit screws into\u003c\/strong\u003e. Check the brass plug for leaks, corrosion, or damaged threads, and replace it if necessary. The last images show the hi-limit screwed into the \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/astralpool-hurlcon-brass-plug-for-hi-limit-switches\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ebrass plug\u003c\/a\u003e for reference.\n\u003cul\u003e\n\u003cli\u003eOn older heaters, corrosion often makes these two separate parts \u003cem\u003elook \u003c\/em\u003elike one single piece with a larger thread. \u003cstrong\u003eThey are not one piece.\u003c\/strong\u003e It is a hi-limit switch screwed into a separate brass plug -- See images.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eSome brass plugs are not tapped as deeply as others. \u003cstrong\u003eIf the new hi-limit does not gently screw all the way in\u003c\/strong\u003e, carefully \u003cstrong\u003efile a small amount off the M4\u003c\/strong\u003e thread on the new switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eDo not overtighten.\u003c\/strong\u003e\u003c\/span\u003e The thin brass M4 thread is extremely easy to break. If you feel any resistance when screwing it in, stop, clean the threads, and apply a small amount of light lubricant. \u003cstrong\u003eBroken threads are not covered by warranty\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThis hi-limit is for the \u003cstrong\u003einlet side\u003c\/strong\u003e of the water connection. Inlet hi-limits are listed below.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHurlcon Astralpool Jacuzzi:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHX 70, HX 120, HX 150, MX 150, MX 200, MX 250, MX 300, MX 350, MX 400, MX 500, JX 130, JX 160, HiNRG 175, HiNRG 250, HiNRG 400, Viron 250, Viron 350, Viron 450, Viron 550, WX 70, WX 120, WX 150, \u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/astralpool-ici-gas-heater-pool-spa-heater\" title=\"Astralpool ICI Gas Heater\"\u003eICI 200\u003c\/a\u003e, \u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/astralpool-ici-gas-heater-pool-spa-heater\" title=\"Astralpool ICI Gas Heater\"\u003eICI 400\u003c\/a\u003e, Jacuzzi and many more.\u003c\/li\u003e\n\u003cli\u003eCampini Ty60 10\/250 T210 41-04 55°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThese are an Extremely Important Safety feature found on heaters, and are required by law. They must be replaced when necessary. \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Limit (Hi Limit) Switches:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/high-limit-switch-42-45\" title=\"Inlet Hi Limit Switch Sensor for Hurlcon Raypak Gas Heaters\"\u003e42-45C° Inlet Hi Limit (Hurlcon, Astralpool)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/high-limit-switch-52-55\" title=\"Outlet Hi Limit Sensor Switch Hurlcon Astralpool Raypak\"\u003e52-55C° Outlet Hi Limit (Hurlcon, Astralpool\u003c\/a\u003e\u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/high-limit-switch-42-45\" title=\"Inlet Hi Limit Switch Sensor for Hurlcon Raypak Gas Heaters\"\u003e)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/high-limit-switch-70\" title=\"70C Outlet Hi Limit HX JX Astralpool Hurlcon Gas Heaters\"\u003e70C° Outlet Hi Limit (Hurlcon, Astralpool)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/high-limit-switch-175-hurlcon-viron-flue\" title=\"Viron Flue Temp Sensor Hi Limit\"\u003e175C° Flue Temp Sensor (Hurlcon, Astralpool)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/web.archive.org\/web\/20221027023657\/https:\/\/heaterandspaparts.com.au\/products\/astralpool-hurlcon-brass-plug-for-hi-limit-switches\"\u003eHurlcon \/ Astralpool HiLimit Locator Brass Threaded Plug\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eManufacturer Catalogues, Diagrams \u0026amp; Part Numbers\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNeed exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues:\n \u003ca href=\"https:\/\/hasp.com.au\/pages\/Astralpool_Catalogue_2026\"\u003eAstralpool Catalogue 2026\u003c\/a\u003e | \u003ca href=\"https:\/\/hasp.com.au\/pages\/Zodiac_Catalogue_2026\"\u003eZodiac Catalogue 2026\u003c\/a\u003e\n\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eInteractive Parts Diagrams\u003c\/h3\u003e\u003c!-- hasp-parts-diagrams --\u003e\u003cp style=\"font-size:16px;\"\u003eFind this part on our interactive heater parts diagrams — each one opens the full exploded view and parts list:\u003c\/p\u003e\u003cul\u003e\u003cli style=\"font-size:16px;\"\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/pages\/astralpool-hurlcon-hx-120-gas-heater-spare-parts-diagram-list\" style=\"color:#009BDB;font-weight:600;\"\u003eAstralpool \/ Hurlcon HX 120 Gas Heater — Diagram \u0026amp; Parts\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Astralpool","offers":[{"title":"42-45° Threaded Hi Limit (VDE-Certified)","offer_id":34730150166684,"sku":"45C° High Limit","price":43.0,"currency_code":"NZD","in_stock":true},{"title":"Hi-Limit w\/ Brass Plug (VDE)","offer_id":42444965413053,"sku":null,"price":109.0,"currency_code":"NZD","in_stock":true},{"title":"Non-threaded (2 screws used)","offer_id":46529550483645,"sku":null,"price":43.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0372\/5253\/files\/astralpool-hurlcon-heater-hi-limit-switch-42-45c-inlet-f2-errors-45-threaded-vde-certified-gas-parts-702.webp?v=1781161151","url":"https:\/\/heaterandspaparts.com.au\/en-nz\/products\/high-limit-switch-42-45","provider":"Heater and Spa Parts","version":"1.0","type":"link"}