As a fan ages, it becomes noisy and delivers less airflow. The fan will eventually stop working altogether. If the fan is not replaced correctly, the components it was cooling will heat up and malfunction. This guide will help you find the proper fan to replace your old one. You may also contact us directly for assistance.


Step 0: Brand And Model


Locate the previous fans brand and model number located on the fans label. Once you have obtained this information, use our Cross List to find a compatible model. If the brand and model number cannot be identified or is not on the Cross List, please move on to Step 1. You might also be able to find the fans specifications by Google searching the model number.

Step 1: Case Dimensions


Models not in our Cross List database have to be manually crossed based on the previous fans specifications. Use a ruler and measure the dimensions of your previous fan. Fans come in standard sizes so it’s easy to find one with the same dimension. They are stated in length x height x width. For example, a 120 x 120 x 38mm fan means it has a 120mm by 120mm square frame and is 38mm thick. An Ø254 x 89mm fan means it has an Ø254mm diameter round frame and is 89mm thick.

Step 2: Current and Voltage


The fans current and voltage can be found on the fans label. The current can be AC or DC. AC has voltages of 100V to 125V, or 200V to 240V. On the other hand, DC has voltages of 5V, 12V, 24V, or 48V. Review our Current and Voltage Guide for more information. Make sure the fan will be connected to a power source that provides the identified current and voltage. An electric outlet in North America provides AC 120V.

Step 3: Connector Types


Lastly, identify the connectors of the previous fan. If there are two wires coming directly from the fan, it has wire leads connectors. If it has two metal prongs sticking out of the fans case, it has terminal connectors. Terminal connector fans can be converted to wire leads by attaching a wire fan cord onto the terminals. Review our Connector Guide for more information.

Step 4: Other Specifications (Not Required)


Most people are finished after Step 3. This is because once you have determined the size, voltage, and connectors; you have a fully functional fan that can replace your old one. However, you can use the same bearing system as your previous fan, explained in detail on this bearing guide. You may also be interested in having the same fan speed, explained in detail on this speed guide. Feel free to change certain specifications if you felt your previous fan was delivering too little air or was too noisy.