This trick electric fan switch is a normally open temperature switch with 3 8 npt male threads that screws into your intake manifolds water passage.
Electric fan with temperature sensor.
Fan thermostat temperature switch with 3 8 pipe thread 185 to 175 degree electric engine cooling fan thermostat temperature sensor switch fits 10 12 14 16 fan with pipe thread.
American volt electric radiator fan ground thermo switch 1 8 1 4 3 8 1 2 inch npt temp sensor thread in brass probe 1 8 npt 180 f on 165 f off 4 0 out of 5 stars 82.
Fan thermostat temperature switch with 3 8 pipe thread 185 to 175 degree electric engine cooling fan thermostat temperature sensor switch fits 10 12 14 16 fan with pipe thread.