2022 Mercedes-Benz GLC300 Radiator Fan Isn't Working

Fixing the Non-Functional Radiator Fan in 2022 Mercedes-Benz GLC300

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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 2022 Mercedes-Benz GLC300 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 2022 Mercedes-Benz GLC300 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 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.

What steps should I take to diagnose the non-functioning radiator fan in my 2022 Mercedes-Benz GLC300?

To effectively diagnose a non-functioning radiator fan in your 2022 Mercedes-Benz GLC300, begin with the simplest solutions before progressing to more complex diagnostics. Start by checking the fuse associated with the radiator fan, as a blown fuse is a common and easily fixable issue that can halt fan operation. If the fuse is intact, inspect the relay, which controls the power supply to the fan; a malfunctioning relay may need replacement. Next, test the fan motor directly by applying power to it; if it fails to operate, replacement is likely necessary. Additionally, verify the functionality of the temperature sensor, as it is crucial for activating the fan when needed. Don’t overlook the wiring; check for any damage or loose connections that could disrupt power flow. Finally, using a diagnostic tool to scan for error codes can provide insights into any underlying issues within the cooling system. By following this structured approach, you can systematically identify and address the problem with your radiator fan.

What are the common causes for the radiator fan not working in a 2022 Mercedes-Benz GLC300?

When troubleshooting a non-working radiator fan in a 2022 Mercedes-Benz GLC300, it's essential to consider several common problems that could be at play. Start by examining the fan motor itself, as a failure here can prevent the fan from spinning and adequately cooling the radiator. Next, check the fuse box for any blown fuses related to the fan, as this is a straightforward fix that can often resolve the issue. Additionally, the temperature sensor plays a crucial role in activating the fan; if it's malfunctioning, the fan may not turn on when needed. Wiring issues, such as loose connections or frayed wires, can also disrupt the fan's operation, so inspect the wiring for any visible damage. Lastly, ensure that the coolant level is adequate, as low coolant can prevent the fan from engaging. By systematically addressing these potential causes, you can effectively diagnose and potentially fix the radiator fan issue in your GLC300.

How urgent is it to address the non-functioning radiator fan in a 2022 Mercedes-Benz GLC300?

When it comes to the non-functioning radiator fan in your 2022 Mercedes-Benz GLC300, the urgency of addressing this issue cannot be overstated. The radiator fan is essential for maintaining optimal engine temperature by dissipating heat generated during operation. If the fan fails, the engine may not receive adequate cooling, leading to overheating, which can cause severe damage such as warped cylinder heads or blown head gaskets. These repairs can be costly and time-consuming, not to mention the potential safety hazards posed by an overheating engine while driving. Therefore, it is crucial to act swiftly and either inspect the fan yourself or consult a qualified mechanic to ensure that your vehicle's cooling system is functioning properly. By addressing the non-functioning radiator fan promptly, you can safeguard your engine's performance and longevity, ultimately saving yourself from significant repair costs and ensuring a safer driving experience.

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2022 Mercedes-Benz GLC300 Radiator Fan Issues & Repairs