2023 Kia K5 Radiator Fan Isn't Working

2023 Kia K5 radiator fan issues and solutions to keep your engine cool

Find Repair Location
Reviewed by
Aisha
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 2023 Kia K5 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 2023 Kia K5 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

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 2023 Kia K5?

To effectively diagnose a non-functioning radiator fan in your 2023 Kia K5, 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. Don’t forget to check the wiring for any signs of damage or loose connections, as these can disrupt power flow to the fan. Finally, using an OBD-II scanner to scan for diagnostic trouble codes can provide insights into any underlying issues within the cooling system. By following this structured approach, you can systematically identify and resolve the problem with your radiator fan.

What are the common causes for the radiator fan not working in a 2023 Kia K5?

When diagnosing why the radiator fan in your 2023 Kia K5 is not working, it's essential to consider several common problems that could be at play. A faulty fan motor is often the primary culprit; if the motor fails, the fan will be unable to cool the radiator, leading to potential overheating. Additionally, check for a blown fuse, as this can disrupt the electrical flow necessary for the fan's operation. Another critical component to inspect is the temperature sensor; if it malfunctions, it may not signal the fan to activate when the engine temperature rises. Wiring issues, such as damaged or corroded connections, can also prevent the fan from receiving power. Lastly, ensure that your coolant levels are adequate, as low coolant can hinder the fan's ability to regulate engine temperature effectively. By systematically examining these areas, you can identify the root cause of the radiator fan's failure and take appropriate steps to resolve the issue.

How urgent is it to repair the non-functioning radiator fan in a 2023 Kia K5 to prevent engine overheating?

Addressing a non-functioning radiator fan in your 2023 Kia K5 is not just a matter of convenience; it is a pressing safety concern that requires immediate attention. The radiator fan is essential for regulating the engine's temperature by dissipating heat generated during operation. When this component fails, the engine is at risk of overheating, which can lead to catastrophic damage, including blown head gaskets, damaged pistons, and warped cylinders. Furthermore, overheating can compromise the integrity of engine oil and coolant, leading to further complications and costly repairs. In extreme cases, prolonged overheating may even cause the engine to seize, resulting in the need for a complete engine replacement. Therefore, it is crucial to prioritize the repair of a malfunctioning radiator fan to safeguard your vehicle's performance and prevent significant financial repercussions.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.