How to change fan sensor in a Polaris Ranger 800 XP

SOURCE: 2004 and a 1/2 polaris overheating ive changed the fan,thermastat,ecm,coolant sensor,rad cap, and flushed thrad out and it still overheats

If you have changed all those components and it still overheats, I would recommend checking to make sure the coolant is actually circulating. The best way to do this is to let your atv run for a while and check both hoses on the engine. Check the hose going to the water pump and the hose coming from the thermostat. They should be close to the same temperature. If they are not, your impeller in the water pump is not pushing the water through the engine. I have seen on occasion the plastic impeller melt. Also check to make sure that your coolant is actually getting hot. There are 2 sensors on the atv, one on the radiator and one on the head. The sensor on the radiator tells the fan when to come on and the sensor on the head tells the hot lamp to come on if it is too warm. Sometimes the sensor on the head will tell the ECM that it is hot prematurely. They are electronics, they can fail. Let me know which sensor you replaced and I can help you a little more if you need. Also it would help a little more if I knew the model. Thanks, Daniel.

SOURCE: 2007 polaris ranger 700 xp stop running all at once will not crank

sounds like a problem with the charging system on the battery. take a volt meter and check the voltage on the battery. If its lower than what the nameplate voltage is, it wont produce enough power to crank the engine. also check the wire connections.

SOURCE: I,ve a 2004 polaris 400 sportsman the cooling fan

You are checking the hotlamp switch only. Also check the fan switch on the radiator and the fuse.
The system powered by a red/black wire from the ignition switch, through the fuse to the switch on the radiator, then an orange/black from the radiator switch to the fan and a brown from the fan to chassis earth. The radiator switch is a simple on/off unit controlled by coolant temperature. Bridging this switch with ignition on should power the fan. Replacing it is straightforward as it unscrews with a wrench or deepwall socket. If not the switch, your problem is either wiring, earth or fuse. (Considering you've already proven the fan). See diagram for a simplified circuit.

SOURCE: overheating polaris sportsman 700

you probly need a new heat sensor, its located on the bottom right of your rad, i had the same problem with my 700 the fan only worked when it was already over heating, i cut the wires flush at the sensor drilled a hole above the key switch and mounted a toggle switch, no more over heating,