{"product_id":"rheem-fv-sensor-replacement-kit-sp20172-flammable-vapor-sensor-white-direct-fit-ap13447-3-with-cap-plug-wire-tie","title":"Rheem FV Sensor Replacement Kit SP20172 – Flammable Vapor Sensor, White, Direct-Fit AP13447-3 with Cap Plug \u0026 Wire Tie","description":"\u003cp\u003e\u003cstrong\u003eThe Rheem SP20172 FV Sensor Kit is a genuine replacement flammable-vapor (FV) sensor assembly that restores flame-detection safety to compatible Rheem and Ruud heating systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit supplies the factory-approved components needed to replace a worn or faulty FV sensor assembly. It includes the sensor element, a matching cap plug, and a 6-inch wire tie so you can reinstall the part with the correct fit and secure wiring. The SP20172 is built to the original equipment specifications and replaces the AP13447-3 sensor, making it an OEM-conforming option when servicing residential and light-commercial HVAC units.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this kit fit my existing Rheem or Ruud unit?\u003c\/h3\u003e\n\n\u003cp\u003eThe SP20172 is designed as a direct-fit replacement for systems that originally used the AP13447-3 sensor. Because it matches the original form and connector layout, installation is typically straightforward for technicians familiar with Rheem\/Ruud control modules. Check your unit’s parts list or the sensor part number before ordering to confirm compatibility.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDirect replacement for AP13447-3\u003c\/li\u003e\n  \u003cli\u003eDesigned to match Rheem\/Ruud original equipment geometry\u003c\/li\u003e\n  \u003cli\u003eCompact dimensions: 6.7 x 2.7 x 9.4 inches\u003c\/li\u003e\n  \u003cli\u003eIncludes cap plug and 6\" wire tie for secure installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat components come in the SP20172 kit and why they matter?\u003c\/h3\u003e\n\n\u003cp\u003eEach kit contains the FV sensor (AP13447-3), a cap plug to seal or protect the connection point, and a 6-inch wire tie to fasten wiring neatly. Providing all three pieces ensures the sensor can be mounted and protected correctly, reducing the chance of loose connections or exposure to contaminants that could affect performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFV Sensor (AP13447-3) — primary detection device\u003c\/li\u003e\n  \u003cli\u003eCap plug (AP13450-3) — protects and seals the sensor connection\u003c\/li\u003e\n  \u003cli\u003e6\" wire tie — secures wiring and prevents strain on connectors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what should technicians expect?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation difficulty is moderate and best performed by a qualified HVAC technician. The kit is intended to replace the original sensor without modifying mounting brackets or housings, but proper electrical isolation and system testing are essential after replacement. Technicians should follow the furnace\/boiler service manual and local safety codes when installing and testing the sensor.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRequires basic HVAC service tools and safety procedures\u003c\/li\u003e\n  \u003cli\u003eNo custom wiring expected when replacing AP13447-3\u003c\/li\u003e\n  \u003cli\u003eSystem diagnostic checks recommended after install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key sizing and replacement details I should know?\u003c\/h3\u003e\n\n\u003cp\u003eThe SP20172 measures approximately 6.7 by 2.7 by 9.4 inches, a compact footprint that suits many control compartments. It’s supplied as a single kit intended to replace the original FV sensor assembly; verify the old sensor’s part number to ensure a match. Using the OEM replacement avoids unexpected fitment or compatibility issues that can arise with generic parts.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eOverall dimensions: 6.7 x 2.7 x 9.4 inches\u003c\/li\u003e\n  \u003cli\u003eReplaces AP13447-3 sensor assemblies\u003c\/li\u003e\n  \u003cli\u003eSold as a complete kit — sensor, cap plug, wire tie\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The Rheem SP20172 kit is aimed at HVAC technicians, service contractors, and experienced DIYers maintaining Rheem or Ruud heating equipment that requires a replacement FV sensor. If your unit’s service diagnostics indicate a flammable-vapor sensor fault or the installed sensor matches AP13447-3, this genuine Rheem replacement supplies the correct parts to restore proper sensing and secure mounting.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the SP20172 replace the AP13447-3 sensor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The SP20172 kit includes the AP13447-3 FV sensor and replaces that original part.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this an OEM Rheem part?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The SP20172 is a genuine Rheem replacement kit intended for Rheem and Ruud systems.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Rheem","offers":[{"title":"Default Title","offer_id":54587064418643,"sku":"B00G2DL8M8","price":53.19,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1095\/4257\/2371\/files\/rheem-sp20172-front-view-packaging.jpg?v=1786698895","url":"https:\/\/findsworth.co.uk\/products\/rheem-fv-sensor-replacement-kit-sp20172-flammable-vapor-sensor-white-direct-fit-ap13447-3-with-cap-plug-wire-tie","provider":"Findsworth","version":"1.0","type":"link"}