Partsam 170 To 185 Degree Electric Thermostat Temperature Switch Fits 10" 12" 14" 16"Cooling Fan Fits 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351W 347 352 360 390 406 427 428 429 460 351C 351M 400M 273 318 340 360 361 383 400 413 426W 440 455 330 326 Engines This kit is perfect for any of our 10", 12", 14", and 16" inch fans, as well as our dual fans. It activates your fan when the temperature reaches 185 degrees and turns off at approximately 170 degrees. Direct Replacement and Ready for Install Straight out of the box. Not remanufactured or rebuilt, 100% Brand New and tested prior to leaving the factory. High Quality Replacement Part, have no-worry 12 months warranty. It is a 3/8&#034; pipe thread. It activates your fan when the temperature reaches 185 degrees and turns off at approximately 170 degrees. This kit is perfect for any of our 10, 12, 14, and 16 inch fans, as well as our dual fans. It is an advance Fan Thermostat Temperature Switch than traditional mechanical pressure sender. 1 pcs x Fan Thermostat Temperature Switch 1.Locate the cooling fan switch near the thermostat housing on the left side of engine behind the distributor assembly. The switch wire colors should be green and black. 2.Disconnect the wire terminal from the cooling fan switch. 3.Allow the engine to reach a coolant temperature of 196-203F (91-95C). 4.Using a suitable ohmmeter or continuity tester, check for continuity between the two fan switch terminals. The fan switch should have continuity (switch closed) at the above temperatures. The switch should have no continuity (switch open) when the temperature drops between 5-15F (3-8C) from the temperature that the switch first had continuity (switch closed). 5.If the switch does not operate within the range of the supplied information, allow the engine to cool below 100F (37C) and replace the switch. 1.Turning off the engine, replace the new cooling fan temperature switches after the water in engine radiator cooled to the room temperature. 2.Avoid the external high heat source after installation. 3.Avoid sprinkling water on surrounding auto parts during the installation. Not re-manufactured or rebuilt. High Quality Replacement Part. Exact Fit for easy installation. 100% Brand New and tested prior to leaving the factory.