Radiator Fan Thermal Switch Sensor Replacement For Polaris ATV/UTV (Fits Sportsman, Ranger, Scrambler, Etc.) - Replaces #4010161

About This Product

Is your Polaris ATV or UTV's radiator fan not turning on when it should, causing the engine to overheat? This little thermal switch could be the culprit. It's a direct replacement for the original Polaris part number 4010161. It's designed to fit a ton of models from the early 2000s, including Sportsman 400-700, Ranger 500, Xplorer, Scrambler, Trailblazer, Magnum, ATP, and Worker. The switch itself is made from aluminum with a rubber seal, and it screws right into the radiator. When the coolant temperature reaches a certain point, the switch closes the circuit and kicks the cooling fan on. Installation is pretty simple if you're handy—just drain a bit of coolant, unscrew the old sensor, and screw in the new one (using thread sealant is a good idea). Always double-check the part number and compare the new switch with your old one before installation to make sure the threads and connector match. A faulty fan switch can lead to serious overheating, so replacing it is a smart, inexpensive bit of maintenance to keep your Polaris running cool on the trails.