Best Radiator Fan Relays of 2025

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Radiator fan relays are essential components of a vehicle's cooling system. They control the operation of the radiator fan, which is responsible for dissipating heat from the engine. Radiator fan relays work by switching the fan on and off based on the temperature of the engine. This ensures that the engine stays within optimal temperature ranges, preventing overheating and damage. These relays come in various types and sizes, depending on the make and model of the vehicle. They are typically affordable and easy to replace, making them a popular choice for DIY car enthusiasts.
At a Glance: Our Top Picks
Top 10 Radiator Fan Relays
Chrysler Dodge Jeep Ram Radiator Fan Relay
This Radiator Fan Relay fits various models of Chrysler, Dodge, Jeep, and Ram ranging from 2008 to 2018. It is a brand new OEM product that ensures a perfect fit and proper functioning of the cooling system. The product comes under the Radiator Fan Relays category.
Four Seasons 36129 Radiator Fan Relay
This standard relay, part number 36129, is designed for radiator fan relays. It weighs only 0.022 pounds and comes in compact dimensions of 3.81 H x 5.842 L x 4.064 W (centimeters).
Mopar Radiator Fan Relay 68094656AA
The Mopar Radiator Fan Relay is a genuine replacement part designed to keep your vehicle's cooling system functioning effectively. Weighing just 0.1 pounds, it is lightweight and easy to handle during installation. This relay is sold as a single unit, making it convenient for users who need a straightforward replacement without extra components. As a specialized relay, it plays a crucial role in controlling the radiator fan, ensuring your engine stays at the right temperature. By using this reliable Mopar part, you can maintain optimal performance and prevent overheating in your vehicle.
AM Autoparts Radiator Cooling Fan Relay
The AM Autoparts Fan Relay is a reliable component designed for various Chrysler, Dodge, Plymouth, and Jeep models. One of its standout features is the impressive 10-year warranty, giving you peace of mind about its durability. This relay is compatible with multiple reference numbers, ensuring that you have the right fit for your vehicle. The high-quality design helps maintain optimal cooling for your engine, which can enhance your vehicle's performance. With this relay, you can expect improved efficiency and potentially extend the lifespan of your engine, making it a smart investment for your car maintenance.
Standard Ignition RY-330K Coolant Fan Relay
This is a relay product designed for use in the radiator fan system. The package dimensions are 5.31 " L X3.79 " W X2.7 " H and the package weight is 0.25 Lbs. The product is made in the United States.
WM Auto Part Radiator Fan Relay
The WM Auto Part Relay is designed to effectively manage your vehicle's cooling system. It helps keep engine temperatures low, promoting a longer lifespan for your car parts. With built-in short-circuit protection, you can drive with confidence, knowing your system is safeguarded against potential electrical issues. The relay matches the original equipment specifications, ensuring a seamless fit and dependable performance. Installation is straightforward, making it easier for you to replace the part without hassle.
Ford F8OZ14N089AA Radiator Fan Relay
The Ford Fan Relay is a genuine Ford part that is designed to fit your specific vehicle. As an accessory power relay, it is manufactured to meet specifications for fit, form, and function. The heavy-duty 12V 70Amp capacity ensures that your radiator fan runs smoothly and efficiently, providing optimal cooling for your engine. With its easy installation process and reliable performance, the Ford Fan Relay is the perfect choice for any car owner looking for a durable and efficient cooling solution.
Standard Motor Products RY330T Radiator Fan Relay
The Standard Radiator Fan Relay is a reliable and efficient relay that is perfect for your car's cooling system. This product is specifically designed to control the electric radiator fan, which is important for keeping your engine cool and preventing overheating. The relay is easy to install, and it comes with a package dimension of 6.35 cm L x 6.35 cm W x 6.35 cm H, making it compact and space-saving. The product weighs only 0.265lbs, which is lightweight and easy to handle. Made in China, this relay is a great choice for anyone looking for a quality product that won't break the bank.
WM Auto Part Radiator Fan Relay 36152
The WM Radiator Fan Relay is designed to efficiently manage heat, ensuring your vehicle operates at cooler temperatures. This not only helps in maintaining optimal performance but also extends the life of your parts. It features reliable short-circuit protection, giving you peace of mind against electrical issues. The relay's design closely matches original equipment specifications, making installation straightforward and hassle-free. With its precise fit, you can trust that it will function reliably, providing you with consistent operation and durability.
Four Seasons 36128 Radiator Fan Relay
The Four Seasons Relay Controller is designed to enhance your vehicle's cooling system. With a lightweight design at just 0.05 pounds, it won't add unnecessary weight to your car. Its compact dimensions make it easy to install in tight spaces, ensuring a hassle-free setup. This controller plays a vital role in regulating the radiator fan, helping to maintain optimal engine temperature. By efficiently managing the fan's operation, it can improve your vehicle's performance and fuel efficiency, giving you peace of mind on the road.
Frequently Asked Questions (FAQs)
1. What are the symptoms of a bad radiator fan relay?
Some symptoms of a bad radiator fan relay include the engine running hot or overheating, the cooling fans not working, the cooling fans continuously running, warning lights indicating an issue, poor air conditioning performance, and unusual noises. If any of these symptoms are present, it is recommended to check the radiator fan relay.
2. Is there a relay for the radiator fan?
Yes, there is a relay specifically for the radiator fan. The radiator fan relay is an electromagnetic switch that controls the power supply to the engine's cooling fans. It helps ensure that the cooling fans function properly when needed, as they draw low power.
3. What happens when a fan relay fails?
When a fan relay fails, it will be unable to supply power to the cooling fans, resulting in the engine running at abnormally high temperatures. This can lead to engine overheating. It is recommended to have the vehicle properly diagnosed to identify the exact cause of the issue, as other problems can also result in high temperatures.
4. How do I know if my fan control module is bad?
If the cooling fans in your car continue to run even after the engine stops, it could indicate a faulty cooling fan control module. The cooling fan should only turn on when the engine starts to become too hot and turn off once it cools down. If the fan runs continuously, it may be a sign of a bad fan control module.
5. What sensor triggers the radiator fan?
In most modern cars, the cooling fan is triggered by the Engine Control Unit (ECU), which receives a signal from the coolant temperature sensor. If the coolant temperature sensor is not working properly, it may not send the signal to the ECU to activate the radiator fan when needed, potentially causing the engine to overheat.
6. Can you drive without a cooling fan relay?
It is not recommended to drive without a cooling fan relay. Bypassing the relay will cause the fan to run continuously, even when the engine is not hot. This can strain the engine and lead to overheating. Additionally, it will consume more fuel as the engine will be working harder than necessary.
During our radiator fan relay research, we found 24 radiator fan relay products and shortlisted 10 quality products. We collected and analyzed 2,494 customer reviews through our big data system to write the radiator fan relays list. We found that most customers choose radiator fan relays with an average price of $16.76.
The radiator fan relays are available for purchase. We have researched hundreds of brands and picked the top brands of radiator fan relays, including Mopar, Four Seasons, AM Autoparts, Standard Motor Products, WM Auto Part. The seller of top 1 product has received honest feedback from 509 consumers with an average rating of 4.6.

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.