Choosing a dual fan relay kit can improve engine cooling, especially in high-performance or tow-heavy applications. This article highlights five top-rated dual electric fan relay kits that fit common 10–16 inch fan setups, with temperature-controlled switches to prevent overheating. Each kit includes essential components like relays, wiring harnesses, and thermostatic switches. Use the buying guide below to compare compatibility, installation ease, and temperature control features.
Summary of Selected Products
- FASTSTORM Dual Electric Fan Relay Kit, 60 Amp, 185°F On / 175°F Off, 10–16 inch fans
- ZOZOMOTORS Dual Electric Fan Relay Kit, 40 Amp, 185°F On / 175°F Off, waterproof relay
- FASTSTORM Dual Electric Fan Relay Kit, 60 Amp, 200°F On / 185°F Off
- TGGKKPARTS 40 Amp Dual Electric Fan Relay Kit, 185°F On / 175°F Off, 12V
- Ronybuy Dual Electric Fan Relay Kit, 40 Amp, 185°F On / 175°F Off
FASTSTORM Dual Electric Fan Relay Kit (60A) — 185/175 Temperature
This dual fan relay kit is designed for efficient cooling across a range of fan sizes (10″, 12″, 14″, 16″). It includes a 60A relay, a 4-pin waterproof relay, and a relay switch. The temperature switch activates at 185°F and turns off at 175°F, helping to maintain an optimal engine temperature. Installation uses a clear wiring diagram, with color-coded connections for straightforward setup. The kit is suitable for upgrading an existing electric fan system or replacing worn components.
The kit covers both dual and single fan configurations, ensuring versatility for various engine bays. Its components are selected to minimize drag on the electrical system while delivering reliable cooling performance under demanding driving conditions. This option is a strong choice for enthusiasts who want a robust, ready-to-install solution.
ZOZOMOTORS Dual Electric Fan Relay Kit — 40A, 185/175 Temperature
All wiring is clearly labeled and color-coded, with a detailed wiring diagram included. The kit supports 10–16 inch fans and uses a 40A relay. Temperature control activates around 185°F and deactivates at 175°F. A 3/8 inch pipe thread temperature switch, plus a 1/2 inch adapter, is included for flexible installation. The kit also comes with a 40A relay, wiring harness, inline fuse holder, fuses, and multiple connectors to simplify wiring for a clean, reliable setup.
This kit emphasizes universal fit and clear instructions, making it accessible for DIY installations. The waterproof relay adds durability in harsh conditions, which is beneficial for off-road or exposed engine bays. It’s a practical option for users seeking dependable cooling without complex wiring.
FASTSTORM Dual Electric Fan Relay Kit — 200/185 Temperature
This kit provides a precise control setup with a 60A relay and a straightforward wiring diagram for dual-fan wiring. It supports 10–16 inch fans and uses a temperature switch to turn on at 200°F and off at 185°F. The included 3/8 inch to 1/2 inch adapter and other hardware facilitate a complete, plug-and-play installation. A dedicated dual-fan wiring path helps prevent overloading the electrical system while maintaining consistent engine cooling during heavy use.
Installation clarity is a notable feature here, with labeled connections that reduce the chance of miswiring. The temperature targets are suitable for users who need tighter control over high-temperature conditions, such as towing or hot climates, while still preserving overall engine efficiency.
TGGKKPARTS 40A Dual Electric Fan Relay Kit
This 40A dual fan relay kit is designed for 12V systems and supports 10–16 inch fans. It includes a waterproof relay, wiring harness, thermostat switch, and an inline fuse block with fuses. The thermostat turns a fan on at 185°F and off at 175°F, with a 3/8″ NPT thread and a 1/2″ adapter included. A note highlights proper grounding of the thermostat threads to ensure reliable operation. The kit provides a complete, ready-to-install solution for upgrading or replacing an electric cooling fan system.
With multiple wiring components and a robust relay, this kit emphasizes reliability in both installation and operation. It’s well-suited for drivers who want a straightforward, durable package that covers most standard dual-fan setups.
Ronybuy Dual Electric Fan Relay Kit — 40A, 185/175 Temperature
The kit is designed for compatibility with 10–16 inch cooling fans and fits a broad range of engines. It includes a 40A relay and a thermostat switch (3/8″ NPT) with a 1/2″ adapter. The wiring follows a simple red-to-battery, coffee-to-fan, black-to-ignition, and grey-to-sending unit configuration to streamline installation. The relay is described as waterproof, enabling use in tough environments. This package emphasizes a practical, plug-and-play approach for dual-fan cooling systems.
Ronybuy’s kit also notes broad engine compatibility, covering many common V8 and lighter applications. The setup aims to help prevent overheating during demanding driving conditions while offering a durable, weather-resistant relay for longevity.
Buying Guide: Key Purchase Considerations
- Cooling needs and fan size: Ensure the kit supports your fan size (10–16 inches) and can handle your vehicle’s current draw. Larger or high-performance fans may require higher amperage relays (60A) for reliable operation.
- Thermostat temperature settings: Typical on/off points range from 185–200°F on and 175–185°F off. Choose a kit with temperature thresholds that match your engine cooling goals and climate.
- Wiring complexity and diagrams: Look for clearly labeled wiring and included diagrams. A straightforward setup reduces installation time and error risk.
- Relays and durability: Waterproof relays and robust harnesses help ensure reliability in harsh conditions, off-road use, or humid environments.
- Grounding and mounting: Confirm the thermostat or sender unit can be securely grounded in your engine, and check mounting options to fit your engine bay.
- Installation scope: Consider whether you need a dual-fan setup or a single-fan upgrade, and verify that the kit includes all necessary connectors, fuses, and adapters.
- Compatibility with existing systems: Some kits are designed as direct replacements for part numbers or integrate with existing cooling components; verify compatibility with your vehicle model and radiator.
- Maintenance and spare parts: Availability of spare relays, fuses, and temperature switches can reduce downtime if components wear or fail.
In selecting a dual electric fan relay kit, weigh the trade-offs between higher amperage (for stronger cooling and future upgrades) and installation simplicity. For most standard 12V passenger vehicles, a 40A to 60A kit paired with a 185–200°F activation range offers robust cooling control without excessive electrical load. Durability features, such as waterproof relays and clear wiring diagrams, reduce long-term maintenance concerns and support reliable performance across seasons.