Genesis G80 Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functional Radiator Fan in Your Genesis G80 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 Genesis G80 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 Genesis G80 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.

Troubleshooting Radiator Fan Issues in a Genesis G80

When troubleshooting radiator fan issues in your Genesis G80, it's essential to adopt a systematic diagnostic approach. Start by checking the simplest components, such as the cabin air filter, which can become dirty and restrict airflow, leading to overheating. Next, inspect the electrical system for blown fuses or damaged wiring that could prevent the fan from operating. If these initial checks do not resolve the issue, examine the refrigerant levels in the AC system, as low refrigerant can affect the fan's performance. Additionally, assess the condition of the condenser and evaporator for any clogs that may hinder airflow. If the fan still fails to engage, consider testing the blower motor and blend door actuator, as these components are vital for proper air circulation. By following this methodical approach, you can effectively identify and address the root cause of radiator fan problems, ensuring your Genesis G80 runs smoothly and efficiently.

What Are the Common Causes of a Non-Working Radiator Fan in a Genesis G80?

When diagnosing a non-working radiator fan in a Genesis G80, it's crucial to consider several common problems that could be at play. One of the primary culprits is the fan assembly itself, which may be faulty and unable to operate as intended. Additionally, the fan clutch can malfunction, preventing the fan from engaging when needed. Another critical component to check is the coolant temperature sensor; if this sensor is not functioning correctly, it may fail to signal the fan to turn on, leading to overheating issues. Beyond these components, other factors such as stretched or cracked serpentine belts, worn accessory pulleys, or electrical relay failures can also disrupt the fan's operation. Addressing these issues promptly is essential to maintain optimal engine temperature and prevent further complications. By understanding these common problems, DIY enthusiasts can effectively troubleshoot and resolve radiator fan issues in their Genesis G80.

Why is the Radiator Fan Not Working in a Genesis G80?

When the radiator fan in your Genesis G80 fails to operate, it is crucial to address the issue promptly to avoid severe consequences. A malfunctioning radiator fan can lead to engine overheating, especially during idling or in heavy traffic, where the fan's role in cooling the coolant becomes vital. Ignoring this problem not only risks damaging the engine but can also compromise your safety on the road. Common culprits behind a non-functioning fan include a faulty fan assembly, fan clutch, or coolant temperature sensor, as well as issues with the fan motor, relay, or fuses. Regularly checking these components and replacing any blown fuses can prevent overheating and ensure your vehicle runs smoothly. Timely diagnosis and maintenance of the cooling system are essential to avoid costly repairs and ensure the longevity of your Genesis G80.

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