How to Replace Computer Cooling Fans

Computer cooling fans are an essential part of a functioning computer. If your computer makes an unusual amount of noise, you probably need to replace one of more of the internal fans. A faulty fan may cause your computer to overheat, which is a much more serious and expensive problem. Replacing cooling fans is a simple job that you can do yourself rather than spending a fortune on a technician.

Step 1 – Remove Cover

Unplug the computer and remove the screws holding the cover in place. Once they have been removed, the cover should be easy to lift off. If it is not, look for any missed screws or consult the manufacturers manual. Some covers have a release button or latch that isn't immediately obvious.

Step 2 – Check Fans

In order to determine which fans need to be replaced, you will have to turn the computer on briefly so that you can inspect it. Look for any fans that don't move, seem to turn slowly or make a loud noise. Don't touch any of the internal pieces while the computer is plugged in. Once you have noted which fan or fans are faulty, shut the computer down and unplug it. The most common cooling fans that need replaced are the case and processor fans.

Step 3 – Choosing Replacement Fans

There are a wide range of fans available in stores and on the internet. Search for the part number of your fan in an electrical store or online. For exceptionally quiet operation, you many want to consider upgrading to a thermo-sensing fan which adjusts the speed of the fan according to the heat it senses.

Step 4 – Replace Case Fan

The case fan is normally the easiest computer fan to replace. On some computers, it is inside a plastic cover which needs to be removed first. This may be secured with a clip or screws to the casing,. Once these are removed, the fan will pop out easily. Unplug the power connection carefully so that none of the pins get bent then position the new fan and replace the plastic cover. If the fan is screwed directly onto the casing, unscrew the fan, disconnect it's power cable and secure the new fan in place. The fan should blow air out of the case when it is oriented properly. Usually, there are arrows on the part to show the airflow direction.

Step 5 – Replace Processor Fan

Some processor fans require you to remove the heatsink and processor together. If this is the case, it is recommended that you ask someone with some computer maintenance experience to help you to prevent any damage to the processor. Normally, the processor fan is held in place by a screw on each corner and is easily accessible. Simply remove the screws and old fan and secure the new one in place.

Step 6 – Replace Cover

Before putting the cover back on, plug the computer in and start it up so that you can check that the fans are working. If everything is working fine, switch off and unplug the machine then replace the cover. Make sure that you replace all of the screws that you removed.