Subaru Impreza Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functional Radiator Fan in Your Subaru Impreza and How to Fix It

Find Repair Location
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 Subaru Impreza 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.

Troubleshooting Radiator Fan Issues in a Subaru Impreza

When troubleshooting radiator fan issues in your Subaru Impreza, it's essential to adopt a systematic diagnostic approach. Begin by checking the electrical system that powers the fan, including the fan motor, relays, and fuses, as these components are often the culprits behind fan malfunctions. Next, assess the engine coolant temperature sensor, which is critical for activating the fan; if this sensor is faulty, it may prevent the fan from turning on when needed. After confirming the sensor's functionality, inspect the main fan relay and the A/C relay, as damaged relays can disrupt the fan's operation. If the fan motor is unresponsive, a temporary fix might involve gently tapping it to see if it restarts, indicating potential failure. Remember that the radiator fan should activate when the engine reaches its operating temperature or when the air conditioning is engaged; if it does not, further investigation is warranted. By following these steps, you can effectively diagnose and address radiator fan issues, ensuring your Subaru Impreza remains in optimal working condition.

How to Diagnose a Non-Working Radiator Fan in a Subaru Impreza?

When diagnosing a non-working radiator fan in your Subaru Impreza, it's essential to understand the common problems that could be at play. One frequent issue is low coolant levels, which can prevent the fan from operating effectively. Additionally, a blown fuse can disrupt the electrical circuit, rendering the fan inoperative. It's also important to check the thermostat, as a malfunctioning thermostat may not allow the engine to reach the necessary temperature for the fan to engage. Furthermore, understanding the wiring and control systems of the radiator fan can help you identify any faults in the relays or connections. By being aware of these common problems, you can systematically troubleshoot and resolve the issue, ensuring your radiator fan operates as intended.

Why is it Urgent to Fix a Non-Working Radiator Fan in a Subaru Impreza?

Fixing a non-working radiator fan in your Subaru Impreza is not just a matter of convenience; it is essential for the health and safety of your vehicle. When the radiator fan fails to operate, the engine is at risk of overheating, which can lead to severe damage and costly repairs. Overheating can compromise engine components, resulting in performance issues that may leave you stranded or facing a breakdown. Moreover, a malfunctioning fan can create dangerous driving conditions, as elevated engine temperatures pose safety risks to both the vehicle and its occupants. By addressing this issue promptly, you not only safeguard your engine's longevity but also ensure that your Subaru operates efficiently and reliably. Ignoring the symptoms of a non-working radiator fan can lead to significant consequences, making it imperative to take action as soon as possible.

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.