FASTSTORM Dual Electric Fan Relay Kit — 60A 4‑Pin Waterproof Relay with 185°F/175°F Temp Switch for 10–16" Fans

FASTSTORM Dual Electric Fan Relay Kit is a complete temperature‑controlled wiring solution that switches dual or single radiator fans on at 185°F and off at 175°F using a 60A 4‑pin waterproof relay assembly.

This all‑in‑one electric fan relay kit supplies the core components to convert or upgrade a vehicle cooling system: a thermostatic switch, 60‑amp relay(s), fan harness wiring, fuse holders, and a clear wiring diagram. It supports 10", 12", 14", and 16" fans and is engineered for reliability in road, track, and marine environments. The kit prioritizes temperature‑based automation to reduce unnecessary run time and protect the engine from overheating while keeping installations straightforward for DIYers and professional installers alike.

How does the thermostat switch manage fan operation?

The included temperature sensor switch monitors coolant or radiator temperature and triggers the relay when the sensor reaches 185°F, then opens the circuit at 175°F. This hysteresis prevents rapid cycling and delivers consistent cooling where it’s needed.

• 185°F on / 175°F off temperature thresholds
• Plugs into the relay harness for automatic control
• Reduces fan runtime and electrical load when idle

What components are included for wiring and installation?

The kit provides a full set of wiring pieces so you won’t need extra parts: a 60A heavy‑duty relay, 4‑pin waterproof relay, fan harnesses, fuse holders, ring terminals, and a printed wiring diagram. Color‑coded leads simplify connections to power, ignition, and the fan motors.

• 60A main relay and 4‑pin waterproof relay for corrosion resistance
• Waterproof fuse holders with fuses included for circuit protection
• Clear wiring diagram and labeled wires (red +12V, blue fan relay, yellow ignition, grey switch)

Will it work with my vehicle and fan size?

This relay kit was designed for universal fitment across cars, trucks, SUVs, and boats and is compatible with common electric fan diameters. It supports single or dual fan configurations and handles high current loads typical of larger aftermarket fans.

• Compatible with 10", 12", 14", and 16" electric fans
• Suitable for single or dual fan setups with shared relay control
• Good for automotive, light truck, and marine cooling applications

How durable and weatherproof is the relay kit?

Critical parts such as the relay and fuse holders are sealed to resist moisture, road spray, and engine‑bay exposure. Heavy gauge wiring and solid connectors are chosen to withstand vibration and temperature extremes.

• Waterproof fuse holders to prevent corrosion and shorts
• Sturdy 60A relay rated for continuous automotive loads
• High‑quality terminals and protected wiring for long service life

Who this kit is for: The FASTSTORM Dual Electric Fan Relay Kit is ideal for DIY mechanics, performance enthusiasts, and professional installers who need a ready‑to‑install temperature‑based fan control package. Choose this kit if you’re converting to electric fans, replacing worn relay components, or adding a reliable thermostat switch to improve cooling efficiency and protect your engine under load or heat stress.