How do you remove and replace thermo fan switch?

To remove and replace a thermo fan switch, first disconnect the vehicle's battery to ensure safety. Locate the thermo fan switch, typically found on the engine or radiator; then, unplug the electrical connector and use a wrench to unscrew the switch. Install the new switch by screwing it into place, reconnecting the electrical connector, and finally reconnecting the battery. Before finishing, check for leaks and ensure the fan operates correctly.