Identifying the Sounds From an Air Conditioner
Homeowners usually ignore these sounds when they first appear, but soon they realize something is wrong with their HVAC system.
Most modern air conditioners barely make a sound when in operation. However, air conditioners can sometimes start producing weird noises, from hissing to rattling. Homeowners usually ignore these sounds when they first appear, but soon they realize something is wrong with their HVAC system.
Here is what different sounds coming from the air conditioner can mean.
Buzzing
Unfortunately, a buzzing noise coming from the AC can point to several issues. If the sound comes from the outdoor AC equipment, it usually means something is wrong with the condenser fan or the compressor. On the other hand, if it comes from the AC's indoor part, the evaporator coils might be frozen.
Other issues related to the buzzing sound include loose parts, broken fan blades, and a dirty condenser coil. In addition, there might be debris stuck somewhere in the ductwork.
Hissing
If a hissing sound comes from the air conditioner, there could be a leak in the refrigerant within the expansion valve. Other reasons the AC is producing a hissing sound include:
A defective expansion valve
Cracked pipes
Faulty copper lines
High pressure in the compressor
If not addressed, the hissing sound can quickly turn into a high-pitched squealing, which is much more uncomfortable. In addition, if there is leaky refrigerant in the HVAC system, it can sometimes also produce a bubbling sound.
Screeching
A screeching noise coming from the AC certainly isn't pleasant. However, if your AC makes a sound that resembles screeching or squealing, a malfunctioning fan motor is usually to blame. This usually occurs in the outdoor part of the AC.
Rattling
A rattling noise is similar to a metallic grinding sound, which is never a good sign. This usually means there is a loose part or a damaged belt. For example, it might be a loose piston pin, connecting rod, or crankshaft. It can also point to a worn-out compressor, which needs replacement.
Clicking
A clicking sound usually means there's something wrong with the electrical system. It might also indicate a broken thermostat. Whatever the issue, an ongoing clicking sound is usually a cause for concern, and it can quickly escalate into something more serious.
Humming
Unlike other sounds the AC might be producing, a humming noise isn't as concerning. However, it can mean a loose bit somewhere in the system.
Enjoy your AC in peace
There could be many reasons the AC is producing odd noises. However, ignoring the AC's weird sounds can only worsen the problem. Better act now and repair the faulty part, or you might be required to buy a new AC unit.
Instead of speculating what might be wrong with the air conditioner, it's better to call professional HVAC maintenance technicians. They will be able to determine why the AC is making a strange noise and fix it quickly and efficiently.
The technicians at Above and Beyond Air Conditioning & Heating specializes in fan blade repair or replacement, evaporator coil service, AC drain line cleaning and unclogging, and AC circuit board repair or replacement to restore proper air conditioner functioning. Schedule a service by calling us at (210)794-9895.
