AC Blower Fan Making Loud Noise? Try Taking These Steps

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Your air conditioner has two components that work together to produce cold air. One part that can make quite a bit of noise is the outside condenser unit, which uses a fan to help cool down the unit and prevent it from shutting down. If the fan has gotten louder over time, you may be wondering why it is happening and how it can be fixed. Here are some tips for dealing with that loud fan on the condenser unit.

Gather Tool and Materials

Before you can get started, you'll need a few basic tools to help get the job done. Get out your socket set, a screwdriver, and an adjustable wrench. Anything that you don't own can be purchased at a local home improvement store.

Prep The Fan

Begin by shutting down all power running to your condenser unit, which should be done by shutting off power at the main circuit breaker in your home. Next, use your screwdriver to start removing the grate on top of the condenser unit that is covering the fan. Make sure to put these screws in a safe place, such as a sealed bag, so that you do not use them.

With the screws removed, lift the grate off of the condenser unit to gain access to the fan. The fan should list out of the assembly, which will allow you to turn it upside down to gain access to the bottom of the fan.

Inspect The Fan

Take a close look at the blades of the fan, looking for places that are bent or broken. Any fan blade that is damaged should be replaced with a new one. Thankfully, a local HVAC repair service can help track down the exact part that you need to fix it.

You'll want to try spinning the fan with your hand, paying attention to how the blades rotate. Do you notice any resistance? This means that the problem is with the motor, which may require replacement. Wobbling fan blades are an indication that the blades need tightening, which can be done with an adjustable wrench. Tighten those screws and see if the wobble is reduced.

Reassemble The Fan

When finished, place the fan back into the condenser unit, secure the metal cover on top, and power the unit back on. Turn on the unit with the thermostat and see if the noise has been reduced. If not, you may want to contact a local air conditioning maintenance company to investigate the problem for you.


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