An AC delivers cool air into your home, maintaining comfortable indoor conditions. Nowadays, manufacturers incorporate sound-dampening technology in modern AC units. Such units produce very low sound levels when operating, increasing indoor comfort. So, if you hear overly loud noises, your cooling system could be faulty. Since a noisy AC will disrupt your ambiance, you should hire a repair expert to assess the system. They will test the system's functionality to determine the faulty components and remedy them. Below are the causes of a noisy AC.
After years of use, your AC will undergo wear and tear. When that happens, fasteners securing the condenser unit in position loosen, causing it to generate vibrations. This makes other indoor unit parts become loose, resulting in rattling noises as they vibrate. On the other hand, twigs and stones can enter the condenser, causing damage to internal components. Consequently, you will hear rattling noises when this debris hits the condenser casing. Therefore, you should contact an AC professional to clean and mount a cover on the condenser to prevent infiltration by outdoor elements.
The electrical wiring in your AC can loosen over time and malfunction. This may create an electrical arc that generates a humming noise. In addition, the contactor relay switch can fail due to wire insulation deterioration and create humming noises upon failure. A faulty capacitor may also hinder the motor from providing sufficient torque for the fan to spin. As a result, power will reach the fan motor without rotor movement, resulting in humming noises. When you experience such sounds, enlist the services of an AC contractor to rectify the electrical faults.
If you hear a high-pitched squealing noise, the refrigerant could be leaking. This may result from severe vibrations in the outdoor unit, loosening the connections in the line set. Consequently, the refrigerant will leak and produce a squealing noise, resulting in high internal pressure. On the other hand, the line set can deteriorate from formic acid corrosion, leaking the refrigerant. You may also hear a squealing noise when the coolant is escaping.
The pistons that compress the coolant can wear down over time, causing grinding noises during compressor operation. Furthermore, the fan motor bearings can fail when you fail to lubricate them. As a result, you will hear grinding noises as the bearings scrape against metallic surfaces. In this instance, engage an AC repair technician to replace the pistons in the compressor and lubricate the bearings to prevent overheating.
Contact an AC repair technician for more information.