2017 Porsche 718 Boxster Radiator Fan Isn't Working

Fixing the Non-Functional Radiator Fan in 2017 Porsche 718 Boxster

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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 2017 Porsche 718 Boxster 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 2017 Porsche 718 Boxster 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 2017 Porsche 718 Boxster?

To effectively diagnose the non-functioning radiator fan in your 2017 Porsche 718 Boxster, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the fuse associated with the radiator fan; a blown fuse is a common and easily rectifiable issue that can halt fan operation. If the fuse is intact, proceed to examine the relay, as it plays a crucial role in 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, the motor itself may be defective and in need of replacement. Additionally, check the temperature sensor, which is responsible for activating the fan when the engine reaches a specific temperature. Ensure that this sensor is functioning correctly, as a faulty sensor can prevent the fan from turning on. Don’t overlook the wiring and connections; inspect for any loose or damaged wires that could disrupt power flow to the fan. Finally, utilize a diagnostic tool to scan for error codes related to the cooling system, as this can provide valuable insights into the underlying issue. By following this structured diagnostic approach, you can efficiently identify and resolve the problem with your radiator fan.

What are the common causes for the radiator fan not working in a 2017 Porsche 718 Boxster?

When dealing with a non-functioning radiator fan in a 2017 Porsche 718 Boxster, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty fan motor, which may require replacement to restore the fan's operation. Additionally, a blown fuse in the fan circuit can disrupt power, so checking and replacing any blown fuses is a straightforward first step. Another potential issue is a malfunctioning temperature sensor, which can provide incorrect readings and prevent the fan from activating when necessary; replacing this sensor can often resolve the problem. Wiring issues, such as damaged or loose connections, can also impede the fan's functionality, making it crucial to inspect the wiring thoroughly. Lastly, low coolant levels can trigger the fan to stop working, so ensuring that the coolant is at the recommended level is vital for proper operation. By systematically addressing these common causes, DIYers can effectively troubleshoot and potentially fix the radiator fan issue in their Porsche 718 Boxster.

How urgent is it to repair the non-working radiator fan in a 2017 Porsche 718 Boxster to prevent overheating and potential engine damage?

The urgency of repairing a non-working radiator fan in a 2017 Porsche 718 Boxster cannot be overstated, as it directly impacts the engine's ability to maintain a safe operating temperature. The radiator fan is essential for dissipating heat generated during engine operation; without it, the risk of overheating escalates significantly. Overheating can lead to severe consequences, including warped cylinder heads and blown head gaskets, which not only compromise engine integrity but can also result in costly repairs and extended downtime. Moreover, neglecting this issue poses safety risks, as an overheated engine can fail while driving, potentially leading to hazardous situations on the road. Therefore, it is crucial to address any signs of a malfunctioning radiator fan immediately, ensuring that your Porsche remains reliable and performs optimally. Consulting a qualified mechanic for a thorough diagnosis and prompt repair is highly recommended to safeguard your vehicle's longevity and your safety.

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2017 Porsche 718 Boxster Radiator Fan Issues & Repairs