Raise the front of the car and place it on stands. Remove the mudguard from the engine compartment.
Drain the coolant.
Disconnect the electrical connector from the radiator fan thermal switch.
Remove the radiator fan thermal switch with a wrench.
Screw in the new thermal switch.
Attention! Do not apply sealant to the threads of the thermal switch, as this may interfere with the electrical contact between the switch and the «weight» car.
Fill with coolant.
Start the engine and check for leaks.