2019 Toyota Corolla Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functional Radiator Fan in Your 2019 Toyota Corolla and How to Fix It

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Reviewed by
Devin Cabugcal
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 2019 Toyota Corolla 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 2019 Toyota Corolla 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.

What are the steps to diagnose the non-functioning radiator fan in a 2019 Toyota Corolla?

When diagnosing a non-functioning radiator fan in a 2019 Toyota Corolla, it's crucial to follow a methodical approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the fuse linked to the radiator fan, as a blown fuse is a common culprit that can easily be replaced. If the fuse is operational, proceed to examine the relay responsible for controlling the fan; a malfunctioning relay can disrupt the power supply to the fan. Next, test the fan motor by applying direct power to it; if the motor does not respond, it may need to be replaced. Additionally, check the temperature sensor, which plays a vital role in signaling the fan to activate when the engine reaches a specific temperature; a faulty sensor can prevent the fan from functioning correctly. It's also important to inspect the wiring and connections for any signs of damage or disconnection, as these can significantly affect the fan's performance. Lastly, utilizing a diagnostic tool to scan for any Diagnostic Trouble Codes (DTCs) can help pinpoint specific issues within the radiator fan system. By systematically following these steps, you can effectively diagnose and resolve the issues with the radiator fan in your Toyota Corolla.

What are the common problems that could cause the radiator fan to stop working in a 2019 Toyota Corolla?

When troubleshooting a non-functioning radiator fan in a 2019 Toyota Corolla, several common problems may be at play. One of the first things to check is the fuse associated with the radiator fan circuit, as a blown fuse can easily disrupt the fan's operation. If the fuse is intact, the next step is to inspect the fan motor itself, as it may be faulty and require replacement. Additionally, examine the fan blades for any signs of damage; broken or bent blades can hinder the fan's ability to spin effectively. Another critical component to consider is the temperature sensor, which may fail to signal the fan to activate when the engine reaches a certain temperature. Wiring issues can also lead to fan failure, so ensure that all connections are secure and free from damage. Lastly, be aware that a coolant leak can cause the engine to overheat, potentially affecting the fan's performance. Addressing these issues promptly is essential to prevent engine overheating and maintain the overall health of your vehicle. If you're unsure about any of these steps, consulting a qualified mechanic for a thorough inspection is always a wise choice.

How urgent is it to repair the non-working radiator fan in a 2019 Toyota Corolla to avoid engine overheating?

Repairing a non-working radiator fan in a 2019 Toyota Corolla is an urgent matter that should not be overlooked. 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 severe damage, including the failure of the cylinder head gasket and potential piston or cylinder damage. Additionally, overheating can compromise the integrity of engine oil and coolant, leading to further complications and costly repairs. In extreme cases, if the engine overheats for an extended period, it may seize completely, necessitating a full engine replacement. Therefore, addressing the malfunctioning radiator fan promptly is crucial not only for the immediate health of your vehicle but also for preventing long-term damage and ensuring the safety and reliability of your driving experience.

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