Jeep Cherokee Radiator Fan
Reasons Why Your Jeep Cherokee Radiator Fan Failed
Your Cherokee's radiator is your first line of defense against overheating, but during an emergency, it's your radiator fan that comes to the rescue. A faulty radiator fan often leads to overheating problems, so it's best to replace or repair it immediately. Here are some troubleshooting tips to help you figure out your Jeep Cherokee radiator fan problem:
Weak air conditioning performance
If your air conditioner can't cool your vehicle's cabin properly or if your engine really heats up whenever you turn your air conditioner on, you might have a bad fan relay. Try turning your air conditioner on max and see if your radiator fan comes on. Even if it doesn't turn on instantly, your radiator fan should start running a few moments after your air conditioner was switched on. If it doesn't, your fan relay needs to be replaced.
Noisy or slow radiator fan
If your radiator fan works but is particularly noisy, or if your fan spins very slowly, there is a big chance that your fan motor is already defective. You can try supplying power directly from your battery to your radiator fan with some jumper wires. If your radiator fan still creates a lot of noise and runs slowly, then you have to replace your damaged fan motor.
An overheated engine can be caused by a defective coolant temperature switch. Your coolant temperature switch is supposed to signal your radiator fan to run when your coolant exceeds the switch's rating of about 200 degrees Fahrenheit. If your fan doesn't run even though your temperature gauge shows that your engine is already too hot, you should probably get a replacement coolant temperature switch.
Other troubleshooting techniques
A visual examination of your radiator fan and all its related components such as the fan relay, fan clutch, fuses, and wirings can also help you identify the root of your radiator fan issue. Look for signs of corrosion, buildup of dirt, and other indications of wear in these components. Using a digital multimeter, you can also test if your fan's fuse and wires are giving out the proper resistance.