Ford Ranger Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functioning Radiator Fan in Your Ford Ranger and How to Fix It

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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 Ford Ranger 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 Ford Ranger 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 first indication of a defective fan clutch is a healthy cooling system that runs below or above the normal temperature range. This is due to the fan running too fast or too slow. Also, a seized cooling fan will cause a loud roaring fan noise from under the hood every time the accelerator is pressed, and the engine will feel as if it lacks power. In this situation it would be very difficult to turn the engine cooling fan by hand, of course when the vehicle is off. Finally, if the clutch fails the fan will either turn very slowly, and not respond well to engine speed.

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 Ford Ranger

When troubleshooting radiator fan issues in a Ford Ranger, it's essential to adopt a systematic diagnostic approach that begins with the simplest solutions before progressing to more complex problems. Start by checking the coolant level, as low coolant can hinder the fan's operation. Next, inspect the fuse associated with the radiator fan; a blown fuse is a common and easily fixable issue. If these initial checks do not resolve the problem, examine the thermostat to ensure it is functioning correctly, as a stuck thermostat can prevent the engine from reaching the necessary temperature to activate the fan. Additionally, look for any signs of leaks in the radiator, as these can lead to cooling system failures that affect fan performance. Finally, inspect the wiring for any faults or disconnections that could prevent the fan from receiving power. By following this methodical approach, you can effectively diagnose and potentially resolve radiator fan issues in your Ford Ranger, ensuring optimal engine cooling and performance.

How to Diagnose and Fix a Non-Working Radiator Fan in a Ford Ranger?

When tackling the issue of a non-working radiator fan in your Ford Ranger, it's essential to understand the common problems that could be at play. One frequent culprit is a blown fuse, which can easily be checked and replaced if necessary. Additionally, physical obstructions or damage to the fan itself can hinder its operation, so a thorough inspection is crucial. Low coolant levels can also prevent the fan from functioning correctly, as the system relies on adequate coolant to regulate temperature. If the engine isn't reaching the appropriate temperature, the thermostat may be malfunctioning, failing to open and allow coolant flow. Beyond these, other components such as the fan motor, relay, temperature sensor, and control module should be examined, as any of these parts can contribute to the fan's failure. By understanding these common issues, you can systematically diagnose and address the problem, ensuring your radiator fan operates effectively and keeps your engine cool.

Why is the Radiator Fan Not Working in a Ford Ranger?

When the radiator fan in your Ford Ranger is not functioning, it’s crucial to address the issue without delay. Ignoring symptoms such as overheating or unusual noises can lead to severe engine damage, which may result in costly repairs. A malfunctioning radiator fan can cause the engine to overheat, leading to potential failure of critical components like the head gasket or even the engine itself. Additionally, if the fan is not operating due to a blown fuse or a faulty coolant temperature sensor, the engine may not receive adequate cooling, increasing the risk of overheating during operation. Regularly checking the coolant level and inspecting for any blockages or leaks can help prevent these issues. By taking immediate action to diagnose and fix the problem, you not only ensure the longevity of your vehicle but also maintain safety on the road.

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