Most AC manufacturers create modern units to operate quietly. This is thanks to the addition of sound-damping features such as variable speed blowers, which restrict noisy operation. As such, it can be disappointing when you turn on the AC and hear a significant change in the type of noise it makes. More so, the noisy operation may disrupt your indoor ambiance, not to mention your unit will overwork to deliver an average cooling output, spiking your energy bills. Given this, it is best to call an AC technician to inspect and fix the underlying malfunction once you hear odd noises from your unit. The following are the reasons your AC is making loud noises.
If you install the AC yourself, you may fail to tighten some parts properly. Given this, excessive vibrations from the condenser will cause such loose parts to unfasten inside the unit, causing rattling and banging noises. On the other hand, you may hear a humming when parts such as loose fan blades are in operation. Note that if you neglect immediate repairs, the rotor may detach from the motor, and the line set will leak the refrigerant. Therefore, engage an AC contractor to tighten the loose parts for seamless operation.
An electrical malfunction, such as a voltage spike, can cause damage to your thermostat. In addition, dirt and dust may accumulate on the thermostat over time, hindering the sensor's operation. As a result, you may hear constant clicking noises from the AC when you turn it on. Alternatively, a huge discrepancy between the room and set temperature may cause the AC to strain to cool your home. Note that this temperature difference happens due to the wrong thermostat placement, and your system will make clicking noises.
Displaced or Bent Fan Blades
Your condenser is susceptible to deterioration from damaging elements. In most cases, this happens when twigs and rocks infiltrate the outdoor unit, causing damage to the fan blades. Consequently, the fan blades may bend, producing a whirring sound. Furthermore, foreign objects can dislodge the rotor, causing clunking sounds when the rotor hits the casing. Thus, you should contact an AC specialist to fix the damage and restore quiet operation.
The AC uses the refrigerant to absorb and expel heat outdoors. However, the lines carrying this coolant may deteriorate due to wear and tear and formic acid corrosion. As a result, these lines may leak the refrigerant through small holes, making high-pitched whistling noises. Since prolonged exposure to the refrigerant is detrimental to your health, you should engage an AC professional to patch the line set and regas your system for maximum cooling power.
A loud AC will disrupt the indoor atmosphere, making your interior unbearable. Thus, call an AC repair service to repair the underlying malfunctions and ensure your system is in good working order.