2004 Mitsubishi Outlander Radiator Fan Isn't Working

Fixing a Non-Functional Radiator Fan in a 2004 Mitsubishi Outlander

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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 2004 Mitsubishi Outlander 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 2004 Mitsubishi Outlander 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 steps should I take to diagnose the non-functioning radiator fan in my 2004 Mitsubishi Outlander?

When diagnosing a non-functioning radiator fan in your 2004 Mitsubishi Outlander, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the fuse associated with the radiator fan, as a blown fuse is a common and easily fixable issue that can halt fan operation. If the fuse is intact, proceed to examine the relay, which is responsible for supplying power to the fan; a malfunctioning relay may require replacement. Next, test the fan motor directly by applying power to it; if it fails to operate, this indicates that the motor itself may need to be replaced. Additionally, check the temperature sensor, as it plays a crucial role in signaling the fan to activate when the engine reaches a specific temperature. Faulty wiring or loose connections can also impede the fan's functionality, so inspect these components thoroughly. Lastly, ensure that your coolant levels are adequate, as low coolant can prevent the fan from working effectively. By following this structured diagnostic approach, you can efficiently identify and address the issue with your radiator fan.

What could be causing the radiator fan to stop working in a 2004 Mitsubishi Outlander?

When diagnosing the issue of a non-functioning radiator fan in a 2004 Mitsubishi Outlander, it's crucial to explore several common problems that may be causing the failure. One of the primary culprits could be a faulty fan motor, which, if it fails, will prevent the fan from spinning and adequately cooling the radiator. Additionally, a blown fuse in the fan circuit can disrupt the power supply, rendering the fan inoperable. It's also wise to examine the temperature sensor; if it is malfunctioning, it may not trigger the fan to activate when the engine reaches its optimal temperature. Another factor to consider is the condition of the fan belt; a worn or broken belt can impede the fan's operation. Moreover, a coolant leak can lead to insufficient coolant levels, resulting in engine overheating and subsequent fan failure. Lastly, inspect the electrical wiring and connections for any damage or corrosion, as these issues can also prevent the fan from functioning properly. By methodically addressing these potential problems, you can effectively troubleshoot and resolve the radiator fan issue in your Outlander.

How urgent is it to repair the non-functioning radiator fan in a 2004 Mitsubishi Outlander to prevent engine overheating?

Addressing a non-functioning radiator fan in a 2004 Mitsubishi Outlander is critical to prevent engine overheating, which can lead to severe and costly damage. The radiator fan is essential for regulating the engine's temperature by dissipating heat generated during operation. When this component fails, the risk of overheating increases significantly, potentially resulting in warped cylinder heads, blown head gaskets, or complete engine failure. Moreover, neglecting this issue can lead to diminished engine performance and higher fuel consumption, not to mention the safety hazards posed by a vehicle that may break down unexpectedly. For DIY enthusiasts, it is vital to recognize these risks and act swiftly to diagnose and repair the radiator fan. By doing so, you not only safeguard your vehicle's health but also ensure a safer driving experience. Therefore, if you notice any signs of fan malfunction, such as unusual noises or the fan not engaging when the engine is hot, it is imperative to address the issue immediately to avoid more extensive repairs down the line.

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