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2018 Cub Cadet Challenger 750 Cooling Fan

davisgravel

By davisgravel
in Cub Cadet UTV SxS Forum

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davisgravel Newbie

davisgravel

Posted
Posted

I have a 2018 750 challenger, the cooling fan started running all of the time, even with ignition switch off, it will run till it kills the battery.  I've checked the sensor on bottom of radiator, it's an open circuit no continuity, I found 2 more sensors on top of engine at coolant hose, was able to check 1 of those and it's an open switch as well. I can disconnect all 3 sensors and fan still runs. Only way to kill fan is to unplug it just back from fan motor in wiring harness. Any suggestions would be greatly appreciated.

groged67 Rookie

groged67

Posted
Posted

Run with cap off and see if it has air in lines. They are super long and hard to burp. I had a similar issue after putting a heater in. Took many tries to burp.

T-boss 410 Experienced

T-boss 410

Posted
Posted

I don't know if there is some sort of relay near the fan, but I had a Jeep Grand Cherokee that was doing the same thing. It was the relay that was located on the inner fender. I had to cut out a piece of the front bumper cover, which luckily was not visible when everything was reassembled. Had to remove the battery cable to keep from completely discharging the battery.

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