2018 Dodge Charger Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functioning Radiator Fan in Your 2018 Dodge Charger and How to Fix It

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
34% chance it's the
Fan Motor or Clutch
0%
28% chance it's the
Fan Relay or Fuse
0%
23% chance it's the
Temp Sensor or Fan Control Module
0%
15% chance it's
Something else
The most common reasons a 2018 Dodge Charger radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor.
  • Fan Motor or Clutch: A faulty fan motor or a malfunctioning fan clutch can result in inadequate cooling, causing the engine to overheat.
  • Fan Relay or Fuse: A faulty fan relay or blown fuse can prevent the cooling fan from operating, leading to engine overheating.
  • Temp Sensor or Fan Control Module: A faulty temperature sensor or fan control module can result in incorrect readings, causing the engine to overheat or the cooling fan to operate improperly.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2018 Dodge Charger radiator fan isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Over time serpentine belts stretch, crack, and the ribs that ride on the accessory pulleys being to wear smooth. A squealing noise that increases with engine speed or as engine driven accessories are turned on may be noted. The noise is caused by the belt slipping on the pulleys, insufficiently driving them. Ineffective air conditioning, a battery warning light, or intermittent power steering assist can result from this.

»MORE: Symptoms of a bad serpentine belt

The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.

A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.

A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.

» LEARN MORE: Signs of a bad thermostat, and how to fix it

When the engine coolant temperature sensor fails, it will send inaccurate information to the vehicle’s computer, causing the computer to react to false operating conditions. This will cause the engine to consume more fuel than normal, depleting fuel mileage, and causing black, sooty smoke from the engine under moderate to heavy acceleration. The check engine light will illuminate, and on-board diagnostic trouble codes may be stored for exhaust and emission system failure, fuel delivery system failure, and engine cooling system failure. Overheating may also occur, as the coolant sensor may be leaking fluid out of the engine, creating a an air pocket in the system.

When the radiator fans stop functioning properly, the engine temperature will rise. The spike in temperature will be highest when the vehicle is idling at a stop, but should subside once the vehicle begins moving again.

Additionally, the air conditioner typically won't blow as cold. This is because the air from the radiator fans also blows across the air conditioning condenser, so when the fans fail, both systems suffer.

You'll also usually see the check engine light and notice a drop in fuel economy. It's possible the fan will start making noise if it's failing, as well.

What steps should I take to diagnose the non-functioning radiator fan in my 2018 Dodge Charger?

To effectively diagnose a non-functioning radiator fan in your 2018 Dodge Charger, begin with the simplest solutions before progressing to more complex diagnostics. Start by checking the fuse associated with the radiator fan; a blown fuse is a common and easily fixable issue that can halt fan operation. If the fuse is intact, inspect the relay, as it plays a crucial role in supplying power to the fan. A malfunctioning relay may need replacement. Next, test the fan motor directly by applying power to it; if it fails to operate, the motor itself may require replacement. Additionally, examine the temperature sensor, which is responsible for signaling the fan to activate when the engine reaches a certain temperature. A faulty sensor can prevent the fan from turning on. Lastly, inspect the wiring for any signs of damage or loose connections, as these can disrupt power flow to the fan. If these steps do not resolve the issue, consulting a mechanic or dealership for professional assistance is advisable. By following this structured approach, you can efficiently identify and address the problem with your radiator fan.

What are the common problems that could cause the radiator fan to stop working in a 2018 Dodge Charger?

When diagnosing why the radiator fan in a 2018 Dodge Charger has stopped working, it's crucial to consider several common problems that could be at play. A faulty fan motor is often the primary suspect, as it can fail to spin, leading to overheating issues. Additionally, a blown fuse in the fan circuit can interrupt the power supply, effectively shutting down the fan. Another potential culprit is a defective relay, which is responsible for controlling the power to the fan; if this component malfunctions, the fan may not activate when needed. It's also important to inspect the fan blades themselves, as any damage or breakage can hinder air circulation, exacerbating overheating problems. Lastly, a malfunctioning coolant temperature sensor may fail to signal the fan to turn on at the right temperature, leaving the engine vulnerable to overheating. Addressing these issues promptly is essential to maintain the vehicle's performance and prevent costly repairs.

How urgent is it to repair the non-functioning radiator fan in a 2018 Dodge Charger to prevent engine overheating?

When it comes to the radiator fan in your 2018 Dodge Charger, the urgency of repair cannot be overstated. A malfunctioning radiator fan directly impacts the engine's ability to maintain its optimal temperature, which is vital for preventing overheating. If the fan fails, the engine is at risk of overheating, leading to severe consequences such as warped cylinder heads or blown head gaskets, which can result in costly repairs or even complete engine failure. Additionally, neglecting this issue can diminish your vehicle's performance, increase fuel consumption, and reduce overall efficiency. Therefore, it is crucial to address any signs of a failing radiator fan immediately. By doing so, you not only safeguard your engine's health but also ensure the longevity and reliability of your Dodge Charger, making timely repairs an essential part of your vehicle maintenance routine.

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2018 Dodge Charger Radiator Fan Not Working | RepairPal