1999 Suzuki Swift Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functional Radiator Fan in Your 1999 Suzuki Swift 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 1999 Suzuki Swift 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 cause the engine cooling fan to operate improperly, leading to overheating or inadequate engine cooling.
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 1999 Suzuki Swift 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 are the steps to diagnose the non-functioning radiator fan in a 1999 Suzuki Swift?

To effectively diagnose a non-functioning radiator fan in a 1999 Suzuki Swift, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the fuse linked to the radiator fan; a blown fuse is a common and easily rectifiable issue that could restore functionality. If the fuse is intact, the next step is to test the fan motor directly by disconnecting it from the vehicle and connecting it to a battery. This will help you ascertain whether the motor is operational or needs replacement. Following this, check the fan relay, as a faulty relay can disrupt the power supply to the fan. If the relay is functioning properly, turn your attention to the fan control module and the temperature sensor, both of which are critical for the fan's operation. Finally, ensure that the radiator fan switch is in good working order and examine the overall electrical system for any underlying issues that might be affecting the fan's performance. By following this methodical process, you can effectively pinpoint and resolve the cause of the radiator fan malfunction.

What are the common causes for the radiator fan not working in a 1999 Suzuki Swift?

When dealing with a non-working radiator fan in a 1999 Suzuki Swift, it's crucial to understand the common problems that could be causing the malfunction. One of the primary culprits is the fan assembly itself, which may be damaged or worn out over time. Additionally, the fan clutch can fail, preventing the fan from engaging when needed. Another frequent issue is the coolant temperature sensor, which may not accurately signal the fan to turn on, leading to overheating. Electrical problems are also common; a blown fuse or a faulty relay can interrupt the power supply to the fan, while damaged wiring can prevent proper operation. Furthermore, low coolant levels can affect the cooling system's efficiency, and a malfunctioning fan control module may fail to activate the fan at the right times. Addressing these issues promptly is essential, as driving without a functioning radiator fan can lead to severe engine overheating and potential damage. By understanding these common causes, DIY enthusiasts can better diagnose the problem and take the necessary steps to restore their vehicle's cooling system.

How urgent is it to fix the radiator fan in a 1999 Suzuki Swift to prevent overheating?

Fixing the radiator fan in a 1999 Suzuki Swift is an urgent matter that should not be overlooked, as neglecting this issue can lead to severe engine damage and costly repairs. The radiator fan is essential for maintaining optimal engine temperature; if it fails, the engine can quickly overheat, resulting in symptoms such as smoke from under the hood and a temperature gauge that spikes dangerously high. These signs indicate that the engine is at risk of serious damage, including a blown head gasket, which can be financially devastating. Additionally, a malfunctioning fan clutch may not always present obvious symptoms, but if the vehicle overheats while idling, it is a clear signal that immediate action is required. To effectively diagnose the problem, it is crucial to inspect the electrical system that powers the fan, the signaling system that activates it, and the fan motor itself. By addressing radiator fan issues promptly, you can ensure the longevity and performance of your Suzuki Swift, safeguarding against the risks associated with engine overheating.

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1999 Suzuki Swift Radiator Fan Issues: Causes & Repairs