Does your air conditioner sound louder than normal? If you notice any rattling or vibrating noise coming from your condenser unit, there is a good chance that you have an issue with the fan. The fan is already the loudest part of the condenser unit, but it can become even louder if certain parts become loose. This article explains how to check and repair a loud condenser unit fan.
Shutting Down the Condenser
Actually accessing this part of the condenser unit is probably the most time-consuming part. First of all, you want to turn your thermostat to the OFF position. Since most condenser units don't have a power switch, you will need to find the breaker. This gives you a little extra assurance that your AC won't start up while you are working on it.
Opening the Top Cage
Most fans point downward and are mounted directly to the top cage (or bird guard) of the condenser. Often the noise can be coming from the cage being loose. Just check all of the mounting screws to make sure they are tight. If they are tight, the noise is probably coming from the down rod. To access this rod, you will need to remove the cage and lift the fan out of the condenser.
After you remove the mounting screws, you will need to unplug the power supply into the fan as you lift it out. Set the fan on the ground, facing up, so you can work on it. The nut on the end of the rod is the first thing you should tighten. Most often, just a quick tightening will fix any noise issue. However, look for any broken washers on the stem. If they are broken, tightening the bolt won't fix your sound problems.
The best solution is to remove the broken washers and take them to a store where you can find an exact replacement. If the loose washer is below the fan blades, you will need to careful when you slide them off of the rod. It is important that you remember the order of the blades, washers and nut. It can often be confusing when it comes time to reassemble the fan, so take a picture. This way you can be certain that your fan is put back together correctly.
Once your fan is back together and you close up your condenser, you can test it out. It should now run quieter. If you're still having issues with your air conditioner, contact a company like Thompson Heating & Air Conditioning Inc for assistance.