How to Replace a Furnace Blower Fan

A man works on a furnace.
What You'll Need
A bolt extractor
A new furnace fan
A new fan bracket (optional)

A furnace blower fan is used to move the hot air from the heat exchanger in the furnace to the main ducts in the house. In some cases, the furnace blower fan may start to cause noise. In this case, it will need to be replaced. Here is a look at the process of replacing a furnace blower fan.

Step 1 - Turn Off the Power

Before you start anything else, turn off the power being supplied to the furnace. This is really important to avoid being electrocuted.

Step 2 - Locate the Fan

The easiest way to locate the fan is to open the furnace door and keep it that way. Once the door is opened, you can easily find the location of the fan inside the furnace. The fan is usually located in a way that it is easily accessible.

Step 3 - Cut the Wires

The wires that are connected to the fan have to be cut. The wires have to be cut as close to the fan as possible. Be sure that you don't cut any other wires.

Step 4 - Remove the Fan Bracket

Once the wires are cut properly, the fan has to be removed. It can easily be taken out by simply unbolting the fan bracket from the furnace surface. If there is something in the way like an electric box, you may have to unbolt it first and then access the fan bracket to unbolt it.

Step 5 - Uninstall the Fan

After the fan bracket is removed, the next step is to uninstall the fan from inside the bracket. Remove the bolts from the bracket which houses the fan.

While the fan is being removed from the bracket, be careful not to damage the bracket. The bracket has to be used with the replacement fan.

Step 6 - Install the New Fan

Install the new fan in the bracket. If the bracket is not damaged, bolt the fan back into the bracket.

Step 7 - Install the Fan Bracket

Install the fan bracket inside the furnace by bolting the fan bracket onto the fan’s surface.

Step 8 - Reconnect the Wires

The wires that were cut while uninstalling the fan bracket have to be replaced with the new wires. These wires also need to be used to reconnect the fan.

Step 9 - Check the Fan

The furnace has to be attached to the power socket. Once it is, turn on the fan to check if it works properly.

By following these steps, you can replace a furnace blower fan in no time.