Go to autozone they can print out instructions for you on how to remove and install that part, you can even look at the automotive books for help.
The coolant temperature sensor can be found on the front of the engine, near the thermostat. Remove the coolant temperature sensor retaining nut, to replace it.
replace the sensor.
The coolant temperature sensor on a 2001 Jeep Cherokee is located in the intake manifold. It monitors the flow and temperature of coolant through the engine.
The engine coolant temperature sensor is the sensor that is screwed into the thermostat housing on the top front of the engine.
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The engine coolant temperature sensor is usually on the front of the engine. The coolant temperature sensor will be in the vicinity of the thermostat housing.
Vehicle make, model & engine size needed first.
coolant temperature sensor are located where the coolant runs in the block near the thermostat housing normally the connector are on top of the sensor and the sensor itself screws in with a deep socket. The temperature sensor is usaully located where the coolant runs OUT of the engine close to thermostat housing.
The engine computer uses the signal from the coolant temperature sensor to decide when to activate the radiator fan relay.
You will have to replace the refrigerant, but not the engine coolant.
Under hood, center, upper engine area, mounted in driver side of water outlet
NOTE: this answer is describing the location of the engine coolant temperature sensor - NOT the coolant sensor in the reservoir that warns when the level gets too low.The coolant temperature sensor is located directly adjacent to the thermostat housing. The thermostat housing is what the upper radiator hose (toward the right side of the engine compartment) connects to. You do not have to replace the reservoir to replace this part, but leaky coolant reservoirs are a common problem on this model.