Carrier Air Conditioner Noise [Problems & Solutions]

Every air conditioner makes some noise, but some are typically noisier than others. If you have a problem with a Carrier air conditioner noise, this article helps you solve the problem.

Carrier air conditioner noise

Carrier Air Conditioner Noise Problem – Solved

Several issues with the air conditioner can cause it to become noisy. Check the condenser fan, blower, contactor, and compressor. One or more of these moving parts may have come loose or have debris stuck in them, leading to increased noise from the unit.

1. Condenser Fan

The fan blades may have come loose from the shaft, and if that is the case, they may be hitting the sides of the fan housing. Check the blades and adjust them accordingly. While doing so, clean them to remove debris that may be stuck in them. Ensure the compartment is clean before putting everything in order.

Another part to check is the fan’s motor. If the bearings wear out, the motor gets noisy. Also, if debris is stuck in it, it will get in the way of the motor’s motion and may generate noise. First, ensure the bearings are in good working condition. If they are worn out, you must replace the motor because bearings cannot be repaired. Otherwise, the repair is easy and cost-free; clean the motor if debris is causing the noise.

2. Blower

Consider checking the blower if the noise is coming from the indoor unit. The blower wheel may be loose and hit another part inside the unit, or the motor may be damaged. Open the air handler and inspect it; replace it if the motor is faulty. Otherwise, replace the blower wheel. In addition, check the parts surrounding the blower for possible damage or looseness.

3. Contactor

A defective contactor generates noise. Its primary job is to receive a voltage signal from the control board and close its circuit, causing the voltage to flow to the components in the condensing unit. If you notice the condenser is running without the air conditioner cooling and accompanied by noise, check the contactor. The part may be defective or have entirely failed. Replace the contactor if that is the case.

4. Compressor

The compressor is a vital part of the air conditioning system, and without it, the unit cannot run. Typically, it hums or buzzes but only in a quiet way. However, if it begins to fail, the compressor tends to become too noisy. But the noise does not necessarily mean you have to replace the compressor immediately; the compressor can still run for years in that state. Besides, it is pretty expensive to replace the compressor, sometimes close to the cost of replacing the entire unit.

Carrier Air Conditioner Noise Level

Carrier air conditioners are considered quiet. To know whether your air conditioner is quiet, you must know the noise levels. On the decibel scale, 80 is noisy as a garbage disposal, while 50 is low enough not to disrupt quiet conversations. Therefore, a quiet air conditioner must stay within the range of 50 to 60 decibels.

You will find Carrier air conditioners within that range, some as low as 56 decibels and some as high as 65 decibels. However, some features inform you of the noise level of your air conditioning system. These features are most useful if there is no clear indication of the unit’s decibel.

The fan speed informs you of the possible noise levels from the air conditioner. The lower the fan speed, the noisier the air conditioner becomes. If you have to run the fan at high speed because of temperature demands, it will affect the sound of the unit. Some air conditioners have compressor compartments that act as a sound blanket for the compressor. They muffle the noise, causing the air conditioner to sound quieter.

Another feature is a base pan. Not all air conditioners have it, but the pan has a design to resist possible corrosion and mask some of the air conditioner noise. If your unit has this insulated pan, it will help reduce its noise. Lastly, check the condenser fan blades; some are built to lower the noise output from the outdoor condensing unit.

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Carrier Air Conditioner Making a Buzzing Noise – Quick Fix

Turn off the air conditioner if you hear a buzzing sound. It may be from the compressor if it is malfunctioning. Typically, the compressor quietly hums or buzzes, low enough not to disrupt conversation. However, if it becomes increasingly loud, it may be a sign of damage or wear. 

Buzzing noises from your Carrier air conditioning system may also be a sign of electrical arcing, which is the discharge witnessed when electricity jumps between circuitry. A faulty circuit breaker, contactor relay switch, the motor of the condenser fan, and any other electrical connection in the outside unit may cause this problem.

Contact the Carrier Service Center or hire an independent HVAC technician for immediate assistance. Find out why the unit is buzzing, even if it continues to cool the house. Otherwise, you may have a fire hazard or damage to the air conditioner.

Carrier Air Conditioner Making a Clicking Noise – Solution

Clicking noise from your Carrier air conditioner may indicate a loose fan blade or an obstruction in the fan. Check the condenser fan while the air conditioner runs and see if the noise becomes louder when the fan operates. If that is the case, turn the unit off and clean the fan. Ensure nothing is obstructing it and after that, try running the fan again.

If the fan does not run at all or continues to make a clicking noise, it may be due to an electrical issue. Check the capacitor, thermostat, and compressor. You will need professional help, so consider hiring an experienced HVAC technician for the job.

Carrier Air Conditioner Making a Pulsating Noise – Quick Fix

Poor insulation can cause the air conditioner to make pulsating noises. While it is not something to get overly concerned about, it is best to check the noise. Also, some loose parts can wobble when the air conditioner is running, creating noise. Inspect the outside condensing unit to find the possible cause; use professional help if it is a complex job.


Using a Carrier air conditioner has its perks, such as having sleek lines and low noises. But if you have a problem with a Carrier air conditioner noise, it is best to find out the cause and fix it. Unusual noises tend to signify a serious issue with the unit and if left for too long, the issues may become irreparable. Employ the services of a technician for more complex repairs.

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