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WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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Common Issues You May Encounter with the Jeep Wrangler Fan Blade
The radiator itself is not enough to keep your vehicle's engine at a normal temperature. Behind it mounts the Jeep Wrangler fan blade, which helps cool the component. However, it does not work the moment you start up your vehicle. It has to wait until the engine reaches the normal operating temperature of 195 to 215 F before it cycles on and off as needed to maintain the cool temperature. When the fan blade stops working, your car will most likely overheat. When you have noticed that the fan has stopped working, there should be a root cause to this problem. Below are some of them:
Defective temperature switch or coolant sensor
If your car's fan blade stops working, then there must be something wrong with the temperature switch or the coolant sensor. You will also find that this is the problem when your vehicle is using up more gas than usual. You can confirm this by running your car through an emissions test. If all of its parts are in order except for the cooling system, then this means that either the temperature switch or the coolant sensor is faulty.
Engine thermostat is stuck open
Over time, the engine thermostat will just quit working and get stuck open. When this happens, your Jeep's fan blade will not work as well. To test the thermostat and find out if this has caused the blade to fail, you will need access to the radiator cap. First, make sure that both the radiator and engine have cooled down, the parking brake is engaged, and the wheels have been blocked. Then, remove the radiator cap, fire up the engine, and let it idle. Look through the cap and check the coolant's movement. Note that it should not be flowing at all since the coolant has not reached enough temperature to make the thermostat open. However, if you do see it flowing, then this means the thermostat is stuck open and you will need to replace it.
Other quick checks
To quickly check the fan circuit, start the engine and turn on the air conditioner to max. If the fan blade runs, then the fan motor, relay, fuse, and wiring are all okay. However, note that this doesn't show whether the temperature switch or sensor and powertrain control module are energizing the fan. You will need to check these components separately.
Over time, your car's engine will overheat. If this has happened to you, this might be because you have neglected maintaining the one component you would not have thought of-the Jeep Wrangler fan blade. Contrary to popular belief, the radiator alone cannot keep the engine's temperature at an operating level. Once it had reached that normal range, the fan will cycle on to keep the engine cool, and then turn off again once its temperature has been lowered. If you want to prevent your engine from overheating, try these tips to properly care for your vehicle's fan blade.
Know where the fan blade is located.
Your vehicle's fan is found in the back of the radiator. When you have to remove it, first detach the 6mm bolts with a ratchet. There are usually two on top and another one or two at the bottom of the fan blade. Then, lift the fan out gently as it has not yet been completely disconnected from the system. You will see the wire connector at the bottom of the component once you have lifted it high enough. Remove this electrical wire to disconnect the fan blade.
Check for dirt on the fan blade and clean it.
Just hosing down the fan blade while it is still in the engine compartment won't remove dirt; you still have to clean it thoroughly. After removing the component from the vehicle and setting it down on a flat, clean surface, inspect it carefully to see if there is any grease, tar, or other dirty substances stuck to the blades. If there is any, clean it off by dipping a rag into a degreaser and wiping it on the dirtied areas.
Inspect the cooling fan's fuses.
First, jump the fan with 12 volts. If the component works with a jump, then there might be something wrong with its fuses. Refer to your owner's manual to find where they are kept and check them. You can tell if a fuse is broken by holding it up to the light and seeing if a circuit is connected. You can also use a fuse multi-tester to easily inspect each one. If you find a blown fuse, replace it immediately and test the affected component.
Keep an eye on the engine thermostat.
The fan blade works in sync with the engine thermostat-when the thermostat indicates that the engine has reached its normal operating temperature, the fan turns on. If this component stops working, your fan blade will be defective too.
