There’s never a good time to discover your air conditioner is malfunctioning. But having your HVAC system breakdown in the heat of a Georgia summer is a worst-case scenario. Avoiding a catastrophe like this simply requires you to pay attention to the signs coming from your AC system. The perfect example is when your AC is making a hissing noise. From bad ductwork to a faulty compressor, you’ll want to address any problems quickly. Here are a few possible explanations behind the hissing sound in your AC system. Leaking Ducts  Homeowners in Fayetteville often speak of hissing sounds coming from ducts. The echo chamber that can arise within a ventilation system makes the unique hissing stand out, which usually indicates air is leaking. You may also hear a high-pitched whistle coming from ducts. In either case, you will be facing higher energy costs when air leaks from your ducts due to improper sealing and general deterioration of the system over time. A full-home energy audit may be in order if you find your AC system making noises that suggest a larger underlying problem.

Air Handler Malfunctions  Within the air handler of your HVAC system, you might hear many different types of hissing or gurgling coming from the equipment. Usually, hissing from an air handler means there is air refrigerant leaking. That means the evaporator cooler is not functioning properly. HVAC systems leaking refrigerant create more than an irritating hissing sound. According to Energy.gov, the leaks are hazardous to the environment, as well. While the hissing sound may result from general wear to air handlers or ducts, the cause is often a faulty installation carried out by inexperienced technicians. Auditors certified by the Building Performance Institute (BPI) should oversee any work you have done on your HVAC system. Issues With the Compressor  When you notice your AC is making a hissing noise, it may also be coming from the compressor. A screeching sound may start coming from the system once the hissing gets worse — and that’s the sign of a much larger problem. Hissing or other alarming noises in the compressor could mean your HVAC system is creating pressure conditions that no longer allow for safe operation.

In this case, you have no choice but to turn off the unit and contact a local technician to come fix the pressure issues immediately. A compressor that makes mechanical noises suggests motor problems. Observing Proper AC Maintenance  In most cases, major HVAC problems follow from periods of homeowner neglect. Having a system checked every spring will help you avoid problems once the hot season kicks into full swing. Besides regular filter changes or cleaning, homeowners should perform simple maintenance on the coils, drain channels and window seals. Professional technicians can handle the process through a regular maintenance package. Hissing sounds don’t always mean your AC system is in need of major repairs. However, whether it’s a basic ductwork fix or major issues with refrigerant leaks, contact a Reliable Heating & Air pro to settle the issue before the dog days of summer hit. 839 posts, read 2,074,617 times 19,534 posts, read 39,623,807 times Originally Posted by TheWayISeeThings

I happened to notice something like Spend $5 on a couple of thermometers. If the output from the AC changes significantly... There is a snake in your system... Hissing around the evaporator valve is sometimes more noticeable than others. The liquid is converting to gas. Freon leaks are not harmful to the health in any way unless you sniff the stuff and asphyxiate yourself from lack of oxygen.5 ton ac unit kwh Gurgling sometimes occurs as a system equalizes out in pressure after use.mafna air handling units The temp drop across the cooling coil is usually around 20 degrees. jeep wrangler ac compressor replacementIf it is much less than that, call out a tech. Sometimes computer programs are dumb. computer making hissing sound, louder than usual, Computers Forum, 13 replies

Kittens hissing at father cat just after being fixed and mother cat hissing at her kitten..Why?, Cats Forum, 6 replies gas boiler is making a whining noise, House Forum, 2 replies Oil pressure gauge fluctuating and hissing noise (prob 2 separate things), Automotive Forum, 1 replies Baltimore is really making some noise..., Baltimore Forum, 2 replies Obviously, all of these are related and a snake is involved. Originally Posted by harry chickpeaThat's the most ADD post of the day! And now I have Toy Story quotes running through my head. 342 posts, read 947,030 times Originally Posted by boomtownfunlover The hissing stopped this morning before I left for work. Well, I turned off the AC before heading out the door. We'll see if I have a comfortable night or a not-so comfortable night tonight. Do you see a relationship between these two? Setting the AC at one temp level and leaving it there is best for the system. If out of the house for an extended time turnig it up a few degrees (72 to 76) is OK...

but don't turn it off altogether. BTW, have you gotten those thermometers yet? Originally Posted by MrRationalYou know what I meant! I have read so many varying account on changing the AC levels or leaving them at one level that its impossible to tell who was being truthful. So I did an experiment and set the AC to one level -- 72 -- for 50 days. I just paid my highest energy bill ever, so I certainly isn't more efficient to run it at a constant level all the time. My typical behavior before was to run it at 70 overnight and 78 during the day. I think I will go back to that model. I had also been told to leave the blower on 24x7 -- and that has turned out only to be a money hog. I get circulating the area constantly while I am cooling from 78 to 70, but then it can be turned off. I am not sure what your intention was by suggesting the thermometers?? Were you suggesting I bypass the lockout? In any regard, it intermittently hissed on start-up last night, but it cooled the air.