Your car’s AC system is designed to keep you cool and comfortable when the temperature rises. It’s also designed to operate quietly and unobtrusively. There should be little to no noise from an air conditioning system that’s in good working order. However, if you’re hearing a rattle when you turn the air on, it could be any number of different problems. While your air conditioner is technically a separate system, it’s tied to the rest of the engine by the serpentine belt. The serpentine belt is what’s responsible for turning the pulley at the AC compressor, and pressurizing the lines. The compressor engages/disengages by an electromagnetic clutch. If you turn on the AC and immediately hear a rattling noise, there are a few potential causes: Compressor: If your compressor is beginning to fail, it can make a rattling noise. Pulley: If the compressor pulley bearings are failing, they can make noise (generally a grinding, roaring or squealing noise). Belt: If the serpentine belt is worn, it can slip when the compressor engages, causing noises.

Idler Pulley: It’s possible that the noise is actually from the idler pulley if its bearings are failing (the noise would start when the compressor engages due to the increased load on the engine). Compressor Clutch: The compressor clutch is a high-wear item, and if it’s worn out, it can create a rattle during operation (some vehicles can have just the clutch replaced, but some require replacement of both the clutch and compressor). There are many other potential sources of the noise as well. When the AC turns on, it puts the entire engine under a heavier load. This increased load can cause rattles from things like the power steering pump pulley, loose parts (even a loose hood prop rod can rattle under the additional vibrations created by operating your air conditioner).All images: Adam Clark Estes The first time I saw the new Frigidaire Gallery Cool Connect smart air conditioner my jaw dropped. It was the best-looking window AC unit I’d ever seen with a sleek design and supposedly neat wi-fi functionality.

After a month of using it, I now remember that no gadget is truly perfect—not even if you want it to be.best stand alone air conditioning unit And I wanted this snazzy white box to be perfect. split ac unit costA dependable AC is a true lifesaver during a New York City summer, and unless you’re rich or lucky, your apartment will probably require a window unit. how to replace air conditioning fan motorThe same goes for plenty of cities around the world. What’s always driven me nuts about these essential appliances, however, is that they’re both ugly and annoying to use. Put differently, they’re poorly designed. When Frigidaire showed off the new Cool Connect 8,000 BTU unit at CES this year, it looked like a revelation.

The filter slides out the top of the mesh unit, but you can run the whole thing under water. You definitely want to clean this at least once a month. Good design is about much more than looks. Beyond the almost Apple-inspired white exterior, the Frigidaire AC features a filter that pops out the front, instead of sliding out the side like my old unit, the Quirky Aros. There’s also a little red light that reminds you to clean the filter once a month. Meanwhile, the vents are angled up so that the air circulates through the room from the top down instead of getting blasted straight out the front of the unit and sinking to the floor. That said, the angled vent gimmick doesn’t work very well if you have shades or blinds, since the air just shoots straight up behind the window covering. Believe it or not, the light above fan is actually illuminated in this image. You can see it if you cup your hand around the light to create more darkness. The unit’s good looks are hard to ignore, though.

Even the buttons are beautiful because, well, they don’t exist. The control panel is touch sensitive and wonderfully glossy, though the white LED indicator lights are basically impossible to see in a bright window. But like a cherry on top, the new Frigidaire AC came with these insulated panels that covered up those ugly accordion-style wings on the side making it almost look like the unit was part of my apartment’s architecture. Then there are the smart features. I’m going to be brutally honest here. As I learned from living with the Quirky Aros, internet connected ACs aren’t that useful. The idea that you can adjust the unit from your phone and even program it to turn on when you’re almost home sounds futuristic. The only problem is that taking out your phone and fumbling through an app sometimes takes longer than getting up and pressing a damn button. You might love firing up the AC when you’re on the way home so that your apartment is nice and chilly when you arrive.

I personally prefer turning it on when I walk in the door and letting the air blow in my face until I’m not hot any more. Nevertheless, you can have it both ways with the Frigidaire Cool Connect—but the smart features stop short of learning your habits, like Nest does. The app is there, and it’s a little bit clunky. It basically works as a substitute for the unit’s remote, which I actually use more often. The programming features work just fine. I just never use them. The app is basically a remote with some extra features. If you look closely, you can see the option to “Create a schedule” and “Turn off later.” That’s as smart as this smart AC gets. The true test of any air conditioner, of course, is whether or not it can cool down your living space and keep it cool. The Frigidaire does that with panache—most of the time. Like most modern AC units, the Cool Connect comes with three settings: cool, eco, and fan. The cool mode will bring down the temperature in your place to a desired level and keep it there, gobbling up lots of pricey electricity in the process.

The eco mode turns off and on to keep the room close to your desired temperature without wasting energy. The fan is a fan. Cool mode is the only way to go, in my opinion. On a recent 90-degree day in New York, I turned my bedroom into a beautiful little ice box, and it stayed that way. This is despite the fact that an 8,000 BTU unit is not quite the optimal size for my space. My room requires about 7,000 BTU, so I’m in an awkward position since most units come in 6,000 or 8,000 BTU versions. (The BTU equation is complicated, but this handy tool will tell you what size you need.) But if I keep it in cool mode, the Frigidaire works like a miracle. I have not, however, looked at my electricity bill yet.Eco mode is a different story. For whatever reason, the AC would cool the room down fine at first, but once it started the on-off yoyo game, I’d be bouncing back and forth between sweaty brow and goosebumps. I realize we all have to make some sacrifices on our warming planet, but it’s almost worse to oscillate between too warm and too chilly.

Eco mode is great for keeping your space a reasonable temperature while you’re away, though. Fan mode is a fan. I usually kept the AC in fan mode when I wasn’t home so that my apartment would feel less stuffy. It also serves as a great white noise machine. With those insulated panels on the side, the AC unit really blends in! So let’s talk about noise. My old Quirky Aros was widely criticized for being loud, though I actually enjoyed how it drowned out the activity on my noisy street. The first time I turned on the Frigidaire, I noticed that it was several decibels quieter than the other unit. It’s hardly silent, however. The Cool Connect makes enough noise that I turn it off from time-to-time if I’m watching a movie. (I’m a bit little deaf, so you might not have that issue.) But after a couple of weeks, I noticed a different noise, a high-pitched noise that I initially thought was some sort of clean-the-filter alarm. In fact, it’s a normal sound that the compressor makes.

There’s even an advisory in the manual.The high-pitched noise comes and goes. Depending on my mood, I either tune it out or focus all of my anxious energy onto it, waiting for the moment that it cuts out. I should add that I only hear this noise when the unit is in cool mode, but since I prefer to use it in cool mode, I notice it more and more. I reached out to Frigidaire for more details on what causes the noise and how to avoid it. I’ll update this review if I hear back. All that said, the occasional whine from the Frigidaire window unit is hardly a deal breaker. I love this AC. I love the way it looks. I love the way it turns my bedroom into a beautiful icebox on hot days. I love it enough that when two friends contacted me recently about which AC unit to buy, I said, “Get the new Frigidaire—it’s expensive but worth it.”And it’s really only a little bit expensive. Amazon is selling the Frigidaire Cool Connect for $300 right now, just $40 more than the LG unit our friends at the Wirecutter love.