Why Is Your AC Making a Hissing Noise in Chaska, MN?

As far as home appliances go, your AC is far from silent. In fact, by now you’ve come to expect a low hum whenever your unit is running. While this is completely normal, some sounds may point to deeper problems.

For instance, is your AC making a hissing noise? If so, we’ve got you covered.

Read on to learn why your air conditioning unit could be making hissing noises and how scheduling professional AC services in Chaska, MN, will help fix it.

Why Your AC Keeps Making Hissing Noises

With all its internal components, your AC will always produce some noise while in operation. Hissing noises, however, are far from usual and often indicate that your air conditioner may not be completely safe to operate.

Here are some of the common culprits that could be causing the strange, hissing noises your AC unit is making.

Refrigerant Leak

One of the most likely reasons behind the hissing you’re hearing is a refrigerant leak. Since the refrigerant in your unit is pressurized, it tends to cause hissing sounds when it starts leaking. Sometimes, you could also hear gurgling or bubbling noises on top of the hiss.

Compressor Issue

The compressor is what circulates refrigerant through your AC unit. To do so, your AC’s compressor has to be pressurized. If everything is working properly, your air conditioner will operate as it should. However, if the compressor has a leak or too much internal pressure, that pressure could escape, creating a high-pitched hiss.

Air Duct Leak

Sometimes, your AC making a hissing noise could point to an issue with the duct in your Chaska home. It’s quite common for air ducts to deteriorate over time, developing tears, cracks, or gaps that allow air to escape.

Pinpointing duct-related hissing sounds can be challenging. However, if you’re experiencing an air duct leak, you may also have a hard time keeping your home cool. Others also notice a sudden spike in energy bills, since the AC has to compensate for the conditioned air being lost.

Clogged Condenser Coil

For your air conditioner to run smoothly, it needs both the evaporator and condenser coils. As the evaporator coil absorbs the heat from inside your Chaska home, the condenser coil releases that absorbed heat outside.

Unfortunately, the condenser coil can get clogged, preventing the free flow of air. This, in turn, can create a distinct hissing noise.

Expansion Valve Operation

As alarming as hissing noises can be, there are times when they are normal. For instance, your air conditioner has a thermostatic expansion valve that’s responsible for relieving refrigerant pressure. As it operates, it usually emits quiet hissing noises.

If you only hear hissing occasionally, you have nothing to worry about. If it becomes more constant or changes in pitch, you should do something about it.

What Can Chaska Homeowners Do About Hissing Noises?

Is your AC making a hissing noise? Your first step should be to turn off your unit and immediately determine what’s causing the issue. Unfortunately, given the numerous possible causes, the expertise of a certified HVAC professional is required to determine exactly what you’re dealing with.

Here are some of the key reasons why it’s always best to let a skilled technician address your air conditioner’s hissing noises.

Detailed Inspection

The only way to get to the bottom of the hiss is to conduct a thorough assessment of your AC unit. Fortunately, this is something a professional is well equipped to handle. What’s more, they won’t just inspect your unit, but the ductwork system as well.

Effective Repairs

Determining the cause of the hiss is only half the battle; you’ll still need to fix it. Most of the time, doing so requires tools and expertise that you probably won’t have. For instance, if the hiss is the result of a compressor issue, you’ll need to know how to properly pressurize the system to restore it.