{"product_id":"pack-ms50u-825-3rd-sensor","title":"MASTER SPAS PACK, MS50U 825 3RD SENSOR - x300732","description":"\u003ch2\u003e\u003cspan\u003eMASTER SPAS PACK, MS50U 825 3RD SENSOR - x300732\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003ePACK, MS50U 825 3RD SENSOR\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis original equipment Master Spas pack includes the circuit board and the heater for one low price.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis System Control Pack comes complete with circuit board, heater, temperature sensors, heater gaskets, and plumbing tailpieces.\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"btr5qz\" data-start=\"28\" data-end=\"241\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"63\"\u003eComplete OEM spa control pack\u003c\/strong\u003e designed for Master Spas MS50U systems, integrating the circuit board, heater, and \u003cstrong data-start=\"147\" data-end=\"173\" data-is-only-node=\"\"\u003e3rd temperature sensor\u003c\/strong\u003e for full system management. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"16l1num\" data-start=\"242\" data-end=\"458\"\u003e\n\u003cstrong data-start=\"244\" data-end=\"279\"\u003eAll-in-one replacement solution\u003c\/strong\u003e simplifies repairs by combining key components into a single factory-matched unit, reducing troubleshooting time and compatibility issues. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"qisd5v\" data-start=\"459\" data-end=\"657\"\u003e\n\u003cstrong data-start=\"461\" data-end=\"497\"\u003eControls essential spa functions\u003c\/strong\u003e including water temperature regulation, pump operation, jet cycles, and safety monitoring for stable daily performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"3wvh10\" data-start=\"658\" data-end=\"815\"\u003e\n\u003cstrong data-start=\"660\" data-end=\"686\"\u003e3-sensor system design\u003c\/strong\u003e improves temperature accuracy and heater protection compared to basic dual-sensor packs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"mvjghu\" data-start=\"816\" data-end=\"1040\"\u003e\n\u003cstrong data-start=\"818\" data-end=\"861\"\u003eDrop-in replacement for MS50U platforms\u003c\/strong\u003e used across select Master Spas models (including H2X and Clarity series), but plumbing or wiring adjustments may be required in retrofits. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"10vrz0g\" data-start=\"1041\" data-end=\"1252\"\u003e\n\u003cstrong data-start=\"1043\" data-end=\"1071\"\u003eInstaller-focused design\u003c\/strong\u003e: while labeled “plug-and-play,” proper setup still requires correct configuration of sensors, voltage, and pump circuits for safe operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1tg6vo8\" data-start=\"1253\" data-end=\"1428\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"1255\" data-end=\"1278\"\u003eBest practice note:\u003c\/strong\u003e always verify your exact pack revision and spa model before ordering, as MS50U systems vary in heater wattage, pump configuration, and sensor layout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"0\" data-end=\"318\"\u003e\u003cstrong data-start=\"0\" data-end=\"75\"\u003eQ: What is the Master Spas MS50U 825 3rd Sensor Control Pack (X300732)?\u003c\/strong\u003e\u003cbr data-start=\"75\" data-end=\"78\"\u003eA: The X300732 is a genuine OEM Master Spas control system pack for MS50U 825 spa configurations, combining the main control board, heater, and sensors (including a 3rd sensor) for full spa operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"320\" data-end=\"566\"\u003e\u003cstrong data-start=\"320\" data-end=\"358\"\u003eQ: What does this control pack do?\u003c\/strong\u003e\u003cbr data-start=\"358\" data-end=\"361\"\u003eA: It manages key spa functions including water temperature, heating, pump operation, and safety monitoring through integrated sensors for stable system performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"568\" data-end=\"818\"\u003e\u003cstrong data-start=\"568\" data-end=\"613\"\u003eQ: Which spas is X300732 compatible with?\u003c\/strong\u003e\u003cbr data-start=\"613\" data-end=\"616\"\u003eA: It is used in select Master Spas models such as Clarity Spas, H2X Swim Spas, Healthy Living, and Michael Phelps swim spa series (varies by configuration\/year). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"820\" data-end=\"1065\"\u003e\u003cstrong data-start=\"820\" data-end=\"855\"\u003eQ: What does “3rd sensor” mean?\u003c\/strong\u003e\u003cbr data-start=\"855\" data-end=\"858\"\u003eA: The 3rd sensor is part of the system’s temperature\/flow monitoring setup, helping ensure accurate heating control and protecting against overheating or flow issues. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1067\" data-end=\"1272\"\u003e\u003cstrong data-start=\"1067\" data-end=\"1106\"\u003eQ: Is this an OEM replacement part?\u003c\/strong\u003e\u003cbr data-start=\"1106\" data-end=\"1109\"\u003eA: Yes. X300732 is an original Master Spas\/Balboa control pack designed for direct replacement in compatible MS50U systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1274\" data-end=\"1485\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1274\" data-end=\"1311\"\u003eQ: What is included in this pack?\u003c\/strong\u003e\u003cbr data-start=\"1311\" data-end=\"1314\"\u003eA: Typically includes the control pack assembly with circuit board, heater, sensors, and related fittings depending on configuration.\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:a0a73f2c-f3c9-42d0-9958-01fbde1d827a-6\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:a0a73f2c-f3c9-42d0-9958-01fbde1d827a-6\" data-turn-id-container=\"request-WEB:a0a73f2c-f3c9-42d0-9958-01fbde1d827a-6\" data-testid=\"conversation-turn-14\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"158c01a4-4c91-4c9b-88f5-79da522c3b80\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cul data-start=\"0\" data-end=\"1075\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"yqmoty\" data-start=\"0\" data-end=\"217\"\u003eInspect the control pack regularly for moisture intrusion, especially around the heater, sensors, and wiring connections, to prevent false “sensor sync” or overheating faults. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"mfqtk0\" data-start=\"218\" data-end=\"401\"\u003eKeep the equipment bay clean, dry, and well-ventilated to protect the circuit board and heater components from corrosion and humidity damage. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"8zlxug\" data-start=\"402\" data-end=\"564\"\u003eMaintain clean filters and proper water flow—restricted flow can trigger temperature and sensor errors in MS50U systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"19549dm\" data-start=\"565\" data-end=\"748\"\u003eCheck sensor cables and connections periodically for tight fit, corrosion, or wear, since the “3rd sensor” system depends on stable readings. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jhayj4\" data-start=\"749\" data-end=\"901\"\u003eEnsure stable voltage supply and use proper GFCI protection to avoid stress on the pack during heating cycles. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"926qcx\" data-start=\"902\" data-end=\"1075\" data-is-last-node=\"\"\u003eKeep water chemistry balanced to prevent scale buildup on the heater and sensors, which can reduce accuracy and efficiency over time. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"MASTER SPAS","offers":[{"title":"Default Title","offer_id":45804670681279,"sku":"x300732","price":397.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/x300732.jpg?v=1782926350","url":"https:\/\/se0yig-03.myshopify.com\/products\/pack-ms50u-825-3rd-sensor","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}