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late on a reply. Make sure the fan is getting 12 volts and working. There are 3 Senors for the cooling system. Oil temp sensor on the bottom of the engine, a air temp sensor on front of the machine and a temp control module on the front of the machine. Could be any or all. My 450 foremen would heat up so I ended up changing all 3 sensors. the fan comes on and cools the engine when I drive slow 5mph or less for 1/2 an hour. Problem solved. P.S. the red temp light should come on to let you know things are getting hot. Good luck
