2022 Lexus RC350 Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functioning Radiator Fan in Your 2022 Lexus RC350 and How to Fix It

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 2022 Lexus RC350 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 2022 Lexus RC350 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 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.

What are the steps to diagnose the non-functioning radiator fan in a 2022 Lexus RC350?

To effectively diagnose a non-functioning radiator fan in your 2022 Lexus RC350, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by examining the fuse associated with the radiator fan; a blown fuse is a common and easily fixable issue that can halt fan operation. Next, inspect the relay that controls the fan, as a faulty relay can prevent it from activating. If these components are functioning correctly, proceed to test the radiator fan motor itself, as a malfunctioning motor will require replacement. Additionally, check the wiring for any signs of damage or loose connections, as these can disrupt power supply to the fan. Utilizing a diagnostic scanner to check for error codes can provide further insights into any underlying issues. Finally, monitor the coolant temperature gauge while the engine is running; a rapid increase in temperature without fan activation may indicate a problem. By following this structured diagnostic approach, you can efficiently identify and address the issue with your radiator fan.

What are the common causes for the radiator fan not working in a 2022 Lexus RC350?

When troubleshooting the radiator fan issue in a 2022 Lexus RC350, it's essential to consider several common problems that could be at play. A faulty fan motor is often the primary suspect, as it directly affects the fan's ability to cool the radiator. Additionally, a blown fuse can interrupt the power supply to the fan, rendering it inoperative. It's also crucial to check the temperature sensor, which may fail to send the correct signals to activate the fan when needed. Wiring issues, such as damaged or corroded connections, can further complicate matters by preventing power from reaching the fan. Low coolant levels can also impact the fan's efficiency, as the fan relies on proper coolant circulation to regulate engine temperature. Lastly, a malfunctioning fan relay can disrupt the power flow to the fan, causing it to fail. By systematically examining these potential issues, you can effectively diagnose and address the radiator fan problem in your vehicle.

How urgent is it to repair the non-working radiator fan in a 2022 Lexus RC350 to avoid engine overheating?

When it comes to the radiator fan in your 2022 Lexus RC350, urgency is paramount. A malfunctioning radiator fan can lead to severe engine overheating, which poses significant risks not only to your vehicle's performance but also to your safety. The radiator fan is essential for regulating the engine's temperature by cooling the radiator; without it, the engine can quickly reach dangerous heat levels. This overheating can cause catastrophic damage, including blown head gaskets and damaged pistons, leading to expensive repairs that could have been avoided. Moreover, prolonged overheating can degrade engine oil and coolant, compounding the problem and potentially resulting in complete engine failure. Therefore, if you notice that your radiator fan is not functioning, it is crucial to address the issue immediately. Taking swift action not only protects your engine but also ensures the longevity and reliability of your vehicle, making it a vital DIY task for any Lexus owner.

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.