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HomeRepair HelpRheem Central A/C RepairRheem Central air conditioner is noisy or loud Repair
Rheem Central air conditioner is noisy or loud
A noisy Rheem central air conditioner usually has a straightforward cause. If your central AC is making loud noise, first shut off power at the disconnect box and inspect the outdoor condensing unit for debris hitting the condenser fan blade. Next, check the condenser fan motor for worn bearings by turning the motor by hand; grinding, stiffness, or rough movement points to a failing fan motor. Loose grille or cabinet panels can vibrate and create an air conditioner rattling noise, so tighten them. A loose, damaged, or unbalanced condenser fan blade can also cause condenser fan making noise or noticeable AC fan motor noise. If the fan motor turns roughly, the condenser fan motor itself may need replacement. Finally, a defective contactor can make a buzzing noise and may prevent the unit from cooling and requires electrical testing. Turn off power before cleaning or inspecting, and do not work inside the condensing unit unless you understand the hazards of 240V line voltage and the run capacitor. Enter your Rheem central air conditioner model number to find the exact replacement fan motor, fan blade, panel, or contactor for your system.
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 - Rheem 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 - Rheem 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 - Rheem 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 - Rheem 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 Rheem central AC making a loud noise?
How do I troubleshoot a noisy condenser fan motor?
Can a bad contactor cause my Rheem AC to make noise and stop cooling?
What should I check if my central air conditioner is noisy but not blowing cold air?
How do I find the correct Rheem condenser fan motor or fan blade replacement part?
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