A clutch for a fan is for a fan connected to the serpentine belt or directly to engine. Electric fans like the condenser fan have no clutch as there is no physical connection to the engine, just simply wires to a relay and heat sensor. Our condenser fan is the small electric one in front of the condenser. I am not sure on the exact size of it, but just about any decent electric fan that is wired to push air through the condenser would work fine. I have two on mine as many people have done here. I think the confusion comes into play when some of us have tried to replace our cluth style radiator fans with a large electric style radiator fan setup. I found that no matter how good of an electric fan I could not get temps below 200 consistently, but going back to the clutch style radiator fan and just adding a new clutch my temps stay under 180 even sitting in traffic in TX heat. Not sure about replacing the "engine temp sensor". If you have a clutch style fan there is no such thing, there is a thermostat that opens at a specific temp for the radiator coolant to flow, I am sure there might be a temp sensor for the condenser fan, but it should just come on when you start the AC compressor by turning the AC controls on inside the car.