I needed a new battery so I took my battery out so I could get a new one. Before I got the new battery I started the egine with the pull start without the battery installed. the winch solenoid engaged and I had to use the lights. Now that I have installed the new battery my cooling fan now constantly runs. Any ideas what might have caused this?

 

Disconnect thermister at oil cooler,fan should stop,plug back in if fan runs,replace thermister. NOT good idea to pull start with out battery connected,can cause severe electrical damage. check charging at battery to see if 14 volts above idle,if not reg/rectifier may have fried also. Good luck

 

Where is the thermister located? My dads polaris 325 magnum has the same problem. Fan is always running. Is the thermister the same thing as a thermostat?

 

Thermistor sensor is in the oil cooler. There is also a thermistor module located by the cdi and coil that can short out also. Item #11.Dirt Cheap Yamaha, Polaris, Suzuki & Kawasaki OEM Parts & Accessories – Cycle Parts Warehouse Item #32.Dirt Cheap Yamaha, Polaris, Suzuki & Kawasaki OEM Parts & Accessories – Cycle Parts Warehouse Before you replace either of these expensive parts best to have the manual for diagnostic checks. Worth the 5 bucks rater than throwing parts at one.2002 Polaris Magnum 325 Service Manual PDF Download

 

Thank you. Is that manual good for the 2000 magnum too?

 

2002 was as far back as this site goes,but you can this general year model model manual may narrow it down. May not be that much difference in the 2000-2002 models.DOWNLOAD 1999-2000 Polaris ATV Repair Manual ALL MODELS - Download ...