Dual Activation/Dual Fan Relay Kit on 185 off 175

The Painless Wiring Dual Activation/Dual Fan Relay Kit on 185 off 175 is a complete engine cooling solution designed for vehicles requiring independent or simultaneous dual-fan operation. This relay kit automatically engages electric cooling fans based on precise temperature thresholds, eliminating the need for manual fan switching and reducing the risk of engine overheating. It is ideal for high-performance builds, street rods, custom trucks, and any application where OEM fan control is absent or inadequate.

This dual-fan relay system activates when coolant reaches 185 degrees Fahrenheit and deactivates at 175 degrees, maintaining a stable operating window that prevents thermal cycling stress. The kit includes a 3/8 inch NPT temperature sensor that threads directly into the engine block or radiator, a 1/2 inch NPT adapter for flexible installation, dual relays for independent fan control, and all necessary wiring harness components. The relay design allows each fan to be triggered separately or together, giving builders maximum flexibility in cooling system configuration and load distribution across the electrical system.

This controller is essential for carburetored engines, engine swaps, and custom cooling setups where factory fan logic is unavailable or unreliable. Installation requires basic wiring knowledge and familiarity with NPT threaded connections; the sensor housing adapts to most engine block coolant passages. Weighing 2.09 lbs and measuring 7.5 by 2.15 by 12.35 inches, the compact relay module fits easily into engine bays with limited space. Whether you are building a restomod, race car, or daily-driven custom vehicle, this Painless Wiring dual-fan relay kit for sale delivers proven reliability and precise thermal management.