Summer temperatures in Phoenix, AZ, often go above 100 degrees, so you need an air conditioner you can rely on. If you live in Phoenix or the surrounding areas, keeping your AC running smoothly is imperative. For those who have ever asked, “Why is my AC making a hissing noise?” The experts at 1st Choice Mechanical Cooling and Heating have some answers. Here’s some key information about the possible causes of this odd hissing noise and a few helpful solutions so you can restore peace and comfort to your home as quickly as possible.
Significance of Unusual AC Noises
While mild, occasional AC noises are normal, others should not be ignored. Any unusual, ongoing sounds, such as rattling, squealing, banging, or hissing, are red flags that your AC is experiencing a potentially serious underlying issue. In most cases, unusual AC noises indicate a problem with a major component and could mean that complete system failure is on the horizon.
Possible Causes of Hissing Noises in AC Units
If you notice an AC hissing noise, here are some possible causes for why it might occur.
Refrigerant leaks
Refrigerant is important because it helps your air conditioner absorb heat from outside your home and release it outside to cool the indoor temperature. This substance is constantly under high pressure, so if the refrigerant line is loose, cracked, or damaged, it may produce a hissing sound due to leaking. If your AC makes a hissing noise when turned on, the sound is likely produced as the high-pressure gas escapes from the crack or some other breach in the line. The sooner you can locate and address a refrigerant leak, the better.
Pressure imbalances
If your AC experiences excessive pressure, it might create a distinct hissing sound as it attempts to regulate and rebalance. In most cases, pressure imbalances are caused by clogged or dirty condenser coils that lead to improper air dissipation. When the coils are dirty, the compressor works harder, thus increasing pressure inside the system. Eventually, the pressure increase triggers that unmistakable hissing sound you hear from the AC.
Ductwork issues
Your ductwork carries treated air from the air conditioner to different rooms in your home. However, if the ductwork is cracked or any section is broken, that treated air can escape and start making a hissing noise. Aside from the obvious sounds from leaky ductwork, other issues, like clogged or dirty ducts, may also lead to hissing noises. Dirty or clogged ductwork forces your system to work harder, putting more pressure on various components that may eventually start to make a hissing sound.
Compressor malfunctions
The compressor circulates refrigerant to cool your Phoenix-area home. Too much pressure in the compressor can cause strange noises that indicate something is wrong. This built-up pressure must escape somehow, which might explain why you notice a hissing noise from your AC. A broken or malfunctioning compressor may also produce grinding or hissing noises that could eventually lead to more significant damage.
Potential Solutions for Addressing Hissing Noises
Now that you know more about some of the most common causes of AC hissing noises, here are a few potential solutions:
Professional inspection and repair
Routine AC maintenance protects your air conditioner and prolongs its lifespan. Part of that maintenance should include an annual professional inspection. These inspections help locate minor issues early before they become costly repairs or a system breakdown. If you notice a problem with your AC, get it repaired as soon as possible to prevent further damage and preserve optimum performance.
Refrigerant leak repair
If a refrigerant leak causes a hissing sound, it’s best to have it repaired by the skilled experts at 1st Choice Mechanical. While you may be able to patch a minor leak temporarily, professionals should always address major leaks. Larger refrigerant leaks usually require a professional to replace damaged components like the condenser or evaporator coil. Handling refrigerant is dangerous, so repairing a leak is always best left to a qualified HVAC technician.
Ductwork maintenance and sealing
Leaky ductwork can cause a hissing sound and force your AC to work harder and less efficiently. Regular ductwork maintenance, including occasional cleanings, is a good way to keep your air ducts in proper shape. A thorough inspection should uncover any issues so they can be repaired. If a crack or hole is found, professional ductwork sealing should remedy the issue and stop the hissing noise.
Preventive Measures and Maintenance Tips
Not every air conditioner hissing sound can be prevented, but you can take some steps. Remember these tips to protect your AC and minimize annoying hissing sounds.
Get regular AC maintenance
Schedule a maintenance call for your air conditioner at least once a year, preferably in early spring before the summer season begins. Regular AC maintenance should include a system inspection, cleaning, lubricating moving parts, and changing the air filter. If the HVAC technician identifies any issues, repairing them now is the best way to prevent further damage and more expensive, time-consuming headaches later.
Give prompt attention to unusual noises
Although a few AC noises are normal, paying close attention is important if you notice anything unusual. If your air conditioner produces a loud hissing, grinding, screeching, or squealing sound, it’s crying for help. Don’t ignore unusual noises coming from your AC. Instead, call the team at 1st Choice Mechanical so we can troubleshoot, diagnose, and repair the problem to keep your home cool.
Need Help Diagnosing an Issue With Your Home’s AC Unit?
If your home’s AC unit is making strange noises, let the 1st Choice Mechanical Cooling and Heating experts diagnose and repair the problem. We’re your heating and cooling experts in the Phoenix area, and we’ve earned a strong reputation for our expertise and reliability. We help families and businesses maintain comfortable indoor environments no matter the season. Contact us today to learn more or to schedule service.