{"product_id":"2-pcs-electric-fan-relay-kit-dual-electric-fan-relay-kit","title":"2 PCS Electric Fan Relay Kit, Dual Electric Fan Relay Kit","description":"\u003cp\u003e\u003cstrong\u003eecocstm Dual Electric Fan Relay Kit is a complete 2-relay wiring solution that automatically runs two cooling fans at 185°F and turns them off at 175°F for reliable engine temperature control.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis plug-and-play kit supplies two 40A relays, OE-style thermostat switch, heavy 14AWG wiring, and all connectors needed to replace worn fan harnesses or add a thermostatic control to aftermarket fans. Built for 10–16 inch cooling fans and heavy-duty use, the kit combines a waterproof, high-temperature housing with a clear wiring layout so both DIY enthusiasts and professional installers can complete the job quickly and confidently.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the kit control fan temperature and protect the engine?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit uses an OE-style thermostat that closes at 185°F to energize the relays and opens at 175°F to cut power, creating an automated on\/off cycle that responds to coolant\/exhaust heat. Because the thermostat is mechanical and mounts to the cylinder head or water jacket, it senses real engine temp rather than air temperature alone. Proper earthing of the thermostat and engine chassis is required for correct switching.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eThermostat activation: 185°F on, 175°F off for consistent cooling.\u003c\/li\u003e\n  \u003cli\u003eMounting: fits cylinder head or water jacket for accurate sensing.\u003c\/li\u003e\n  \u003cli\u003eSafety: requires proper grounding to the engine chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat components are included and how do they simplify installation?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit ships with two complete relay harnesses, two 40A relays, fuse holders with 20A fuses, pipe-thread adapters, ring terminals and wire connectors so you avoid sourcing parts separately. Color-coded wires correspond to battery, ignition, fan positive, and switch signals for straightforward wiring according to the supplied diagram. The 14AWG PVC-wrapped wires and waterproof relay housings mean fewer worries about heat damage or corrosion in engine bays.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTwo 40A relays with sealed housings for durability.\u003c\/li\u003e\n  \u003cli\u003eIncludes two 3\/8\" to 1\/2\" adapters for thermostat mounting.\u003c\/li\u003e\n  \u003cli\u003eFuse holders, 20A fuses, ring terminals and connectors ready out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich fan sizes and vehicle types are compatible with this relay kit?\u003c\/h3\u003e\n\n\u003cp\u003eThis wiring kit supports 10-, 12-, 14- and 16-inch electric fans and is designed to suit a wide range of passenger cars, trucks and custom cooling setups. It works well as a direct replacement for factory harnesses or when installing aftermarket fans on street or light commercial vehicles. For high-current or multi-fan systems beyond two fans, consider a higher-amperage solution or additional relay kits.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFan compatibility: 10\"–16\" electric fans.\u003c\/li\u003e\n  \u003cli\u003eVehicle use: cars, trucks, performance and replacement harnesses.\u003c\/li\u003e\n  \u003cli\u003eLimitations: two-relay design best for up to two fans at 40A each.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is safety and longevity addressed in the design?\u003c\/h3\u003e\n\n\u003cp\u003eThe harness uses 14AWG wire with copper conductors and PVC sleeving to resist heat and maintain flexibility; sealed relay housings are made from high-temperature nylon to keep moisture and oil out. Inline fuses protect the circuit from shorting and the included ring terminals ensure secure battery and chassis connections. Proper installation, routing away from extreme heat sources, and firm grounding maximize service life.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e14AWG copper wiring for strong conductivity and stability.\u003c\/li\u003e\n  \u003cli\u003eHigh-temperature nylon relay housings and waterproofing.\u003c\/li\u003e\n  \u003cli\u003eInline fuses and quality terminals for circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The ecocstm 2 PCS Dual Electric Fan Relay Kit is aimed at DIY mechanics, auto shops and vehicle owners who need a reliable thermostatic control for one or two electric fans. It’s ideal for replacing faulty fan wiring, upgrading cooling on hot-running engines, or adding a thermostat-driven fan control to aftermarket radiators. If you need a packaged kit with relays, fuses and mounting adapters that’s built to withstand engine-bay conditions, this kit delivers a practical, easy-to-install solution.\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: What temperature does the thermostat activate and deactivate?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The thermostat closes at 185°F to turn fans on and opens at 175°F to turn them off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this kit run two 16-inch fans safely?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it supports two fans up to 40A per relay, suitable for most 16-inch electric fans.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ecocstm","offers":[{"title":"Default Title","offer_id":48087279435934,"sku":"B0DHRR4BYR","price":36.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ecocstm-front-packaging-relay-kit.jpg?v=1785920168","url":"https:\/\/northtrailauto.ca\/products\/2-pcs-electric-fan-relay-kit-dual-electric-fan-relay-kit","provider":"North Trail Auto","version":"1.0","type":"link"}