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HomeRepair HelpGibson Central A/C RepairGibson Central air conditioner is noisy or loud Repair
Gibson Central air conditioner is noisy or loud
When your Gibson central air conditioner is making loud noise, start with the condensing unit and shut off power before inspecting it. Debris striking the fan blade is the most likely cause of an air conditioner making noise, so remove leaves, sticks, and other objects from the outdoor unit. Next, check the fan motor bearings. If the motor feels rough, stiff, or does not rotate smoothly by hand, it may be causing AC fan motor noise and should be replaced. Loose grille or cabinet panels can also vibrate and create rattling sounds, so tighten them securely. A loose or damaged condenser fan blade can cause a noisy condenser fan; check the motor shaft and set screw, then replace the blade if needed. Worn bearings in the condenser fan motor are another possible cause of central AC making loud noise. If the unit makes a buzzing noise and is not cooling, a defective contactor may be failing to send power to the condensing unit. Contactor testing and other 240V line-voltage work are not safe DIY repairs; contact a qualified HVAC technician. Enter your Gibson 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 - Gibson 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 - Gibson 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 - Gibson 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 - Gibson 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 Gibson central air conditioner making a loud noise?
How do I troubleshoot a noisy condenser fan or AC fan motor?
Why is my Gibson air conditioner making a buzzing noise but not cooling?
How do I know whether to replace the Gibson condenser fan blade or fan motor?
How can I find the correct replacement part for my Gibson central air conditioner?
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