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HomeRepair HelpTrane Central A/C RepairTrane Central air conditioner is noisy or loud Repair
Trane Central air conditioner is noisy or loud
When your Trane central air conditioner is noisy or loud, start with the outdoor condensing unit, where a condenser fan making noise is most often caused by debris striking the fan blade. Shut off power at the disconnect box and inspect the fan blade and cabinet, removing leaves or other debris before testing. Next, check the condenser fan motor for worn bearings. If the motor does not turn smoothly by hand, its AC fan motor noise usually means the motor needs replacement. Loose grille or cabinet panels can vibrate and create air conditioner loud noise, so tighten their fasteners. A loose or damaged condenser fan blade, including a loose set screw or fan shaft, is another possible source of a noisy condenser fan. Less commonly, a failing contactor can buzz or chatter, and can prevent the unit from cooling. Turn off power before opening the condensing unit. Electrical testing and contactor replacement involve 240V line voltage and may be beyond DIY scope, so hire a qualified HVAC technician if you are not trained. Enter your Trane model number to find the exact replacement fan motor, fan blade, panel, or contactor for your central air conditioner.
01 - Debris Hitting Fan
Over time debris can fall into the condensing unit, causing a noise when the fan is running. Inspect the fan blade and inside the unit for any debris. Clean out the outdoor unit as needed but be sure to shut off power to the unit before attempting to clean it out.
Top Solution
02 - Trane Central Air Conditioner Fan Motor
The fan motor has bearings that can wear out over time. When the bearings are worn out, they make loud noise. To check the bearings, try rotating the fan motor by hand. If the motor does not turn smoothly, replace it.
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Highly Likely
03 - Panels Vibrating
If the outdoor condensing unit is noisy, the grille or one of the panels may be loose and vibrating. Check for loose panels and tighten them as needed.
Highly Likely
04 - Trane Central Air Conditioner Fan Blade
The fan blade on the condenser fan motor might be defective or loose. To check the fan blade, wiggle the fan motor shaft. If the motor shaft is loose, tighten or replace the set screw. If the condenser fan motor is still making noise, replace the fan blade.
Less Common
05 - Trane Central Air Conditioner Condenser Fan Motor
The condenser fan motor has bearings that can wear out over time. When the bearings are worn out, they make loud noise. To check the bearings, try rotating the condenser fan motor by hand. If the motor does not turn smoothly, replace it.
Less Common
06 - Trane Central Air Conditioner Contactor
The furnace control board sends a low voltage signal to the contactor. When the contactor receives the signal from the control board, it closes the circuit, sending voltage to the condensing unit components. If the contactor is defective, it will not provide voltage to the condensing unit. In addition, the contactor will make noise when it is defective. If the condensing unit is making noise but not cooling, the contactor has probably failed. To determine if the contactor is at fault, use a multimeter to test the contactor for continuity. If the contactor does not have continuity, replace it.
Less Common
Frequently Asked Questions
Why is my Trane central AC making a loud noise?
How do I troubleshoot a noisy condenser fan or AC fan motor?
Why is my Trane outdoor AC unit making noise but not cooling?
How can I identify the correct Trane condenser fan motor or fan blade?
Should I replace the compressor if my air conditioner is making noise?
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