2016 Buick Regal Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functional Radiator Fan in Your 2016 Buick Regal 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 2016 Buick Regal 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 2016 Buick Regal 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 2016 Buick Regal?

When diagnosing a non-functioning radiator fan in your 2016 Buick Regal, it's crucial to follow a structured diagnostic 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 frequent culprit and can be easily replaced. If the fuse is operational, proceed to visually examine the fan for any signs of damage, such as cracks or obstructions that could impede its function. To further assess the fan's condition, you can perform a direct test by connecting it to a power source, which will help determine if the fan itself is faulty. If the fan operates correctly in this test but fails to engage during normal vehicle operation, you may need to investigate other components, including the thermostat, coolant temperature sensor, or the engine control module (ECM). Additionally, be vigilant for any warning lights on your dashboard, as these indicators can provide valuable insights into underlying issues. By methodically following these steps, you can effectively pinpoint the cause of the radiator fan malfunction and take the necessary steps to rectify the problem.

What are the common problems that could cause the radiator fan to stop working in a 2016 Buick Regal?

When diagnosing why the radiator fan in a 2016 Buick Regal has stopped working, it's essential to consider several common problems that could be at play. One of the primary culprits could be a faulty fan assembly or fan clutch, which directly impacts the fan's ability to operate effectively. Additionally, the coolant temperature sensor plays a crucial role in regulating the fan's function; if it malfunctions, it may not signal the fan to turn on when needed. Another area to inspect is the serpentine belt, as any signs of stretching, cracking, or wear can hinder the fan's performance. Furthermore, issues such as a failed thermostat or coolant leaks from components like the water pump, radiator, or hoses can lead to overheating, which may also prevent the fan from functioning properly. By understanding these potential failure modes, DIY enthusiasts can systematically troubleshoot and address the underlying issues affecting the radiator fan in their vehicle.

How urgent is it to repair the non-functioning radiator fan in a 2016 Buick Regal to prevent engine overheating?

Repairing a non-functioning radiator fan in your 2016 Buick Regal is an urgent matter that should not be overlooked. The radiator fan is essential for regulating the engine's temperature by effectively cooling the radiator; without it, the engine is at a high risk of overheating. This overheating can lead to catastrophic damage, including blown head gaskets, warped cylinder heads, or even a cracked engine block, all of which can result in exorbitant repair costs and potential engine failure. Moreover, neglecting this issue can compromise your vehicle's performance, leading to decreased fuel efficiency and power output. Therefore, it is crucial to address any signs of a malfunctioning radiator fan immediately to safeguard your engine's health and maintain the overall efficiency of your vehicle. Taking prompt action not only protects your investment but also ensures your safety on the road.

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2016 Buick Regal Radiator Fan Not Working: Causes & Repairs