How to Fix a frozen air conditioner?
We are often asked the question, why is my air conditioner freezing up? Figuring out what is causing your air conditioner to ice up can be frustrating, but it is not an uncommon problem. If you’ve read any of our articles, then you know that we are a small, U.S. Veteran-Owned company in Southern California, and pride ourselves on giving honest, straight answers. In fact, most of our posts address either one of two things: first, common air conditioning problems that people have, or second, the questions we get asked most frequently. There are a number of reasons for an air conditioner to freeze up, and it really doesn’t matter whether it is a window AC unit or a central air conditioner – the causes of, and solutions to, an air conditioner that keeps freezing up are exactly the same. It is important to address this issue – a frozen air conditioner will not only cool improperly, but can actually be severely damaged if it keeps freezing up. If you have this problem, you have to address it immediately – it won’t solve itself. In this article, we will tell you what causes a central air conditioner freeze up, and what you can do to fix it.
Standby for a small high school physics lesson. We don’t need to go too in depth, so bear with me, but understanding this principle is the key to figuring out why your air conditioner is freezing up. The Joule-Thomson Effect is a principle in thermodynamics which states that if everything else is kept constant, then as a gas expands, its pressure decreases, and its temperature will also decrease. Likewise, as a gas is compressed, its temperature will increase.
This is because what we sense as temperature is really just a measurement of the amount of energy a molecule has. Simply put, if air molecules are bouncing around rapidly, then you would feel this air as hot. If air molecules are moving around slowly and sluggishly, then you would feel this air as cold. It’s that simple.
So what? This is important to understand because it forms the basis for how your air conditioner works. Your system works by allowing your evaporator coil to expand refrigerant inside of it, causing the coil to cool rapidly. As this rapidly cooled coil comes into contact with your home’s air (which your air conditioner blows over this now cooled coil), the refrigerant absorbs the heat from the air inside of your home.
This newly heated refrigerant is then transported outside of your home where it is compressed, causing it to heat up and transfer the heat that was once inside of your home to the outside air. The cycle then repeats itself over and over again, cooling your home in the process. For more information on the Joule-Thomson Effect, visit this page on Wiki: Joule-Thomson Effect.
Why is this important? Well because this effect is used to allow your air conditioner to cool the air inside of your house. But any time you change part of the equation, you might throw the system out of whack. So to keep this simple, your air conditioner is freezing up because something has altered your system in such a way that it is cooling your evaporator coil more than it should, causing the unit to freeze up. Now that you know how, what you have to do is figure out why your air conditioner is freezing up, and to do this you have to figure out what it was that threw your AC system out of whack. We will do this in the next section.
If you want to delve more into how exactly it is that your air conditioner cools air, take a look at: The Joule-Thomson Effect – Why Your Air Conditioner is Freezing Up, or just watch the video below:
Now that you have a basic idea of how your air conditioner uses expansion and compression to heat and cool its Freon (what is Freon?), you can figure out why your central air conditioner is icing up. Your air conditioner can freeze up for a variety of reasons, so we will discuss them from the most common to some of the more rare causes of ice up.
All of these causes are rooted in the Joule-Thomson Effect discussed above, so if you skipped past it, I’d recommend that you take a quick look or just watch the video above. Simply put, your air conditioner is freezing up because something is either causing the Freon in your system to expand more than it is designed to, which in turn is making your coils colder than normal, or something is preventing the air in your house from transferring its heat into your system. Either way, this causes your evaporator coil to drop below freezing and your air conditioner to freeze up. Here are some common causes:
1. Insufficient air flow across your air conditioner’s evaporator coil can cause it to freeze up.
In a split air conditioner (the most common type – see: What is a Split Air Conditioner?), our air conditioner is designed to drop the temperature of your house by taking heat from it. If your air conditioner is not properly blowing your inside air over the evaporator coil, then this heat exchange cannot take place and the Freon that should be removing heat from your home is not. Over time, its temperature will continue to drop and your air conditioner can freeze up.
2. If your air conditioner is low on refrigerant, then your air conditioner can freeze up.
This is due to lower pressure inside the system itself. This is because now there is less Freon in your system, but it is still being forced to expand the same amount – more expansion equals a cooler temperature. As your air conditioner’s evaporator coil drops below freezing, the moisture in your air will freeze as it comes into contact with your coil causing it to ice up.
3. Air conditioners are designed to function in a very specific temperature range.
If you are running your air conditioner when the outside air is below around 62 degrees, then the pressures inside of your system will drop and this can cause a freeze up of your central air conditioner.
4. Mechanical failures can cause your air conditioner to freeze up.
If there is a kink in your refrigerant lines, a blower fan that is not running or is dinged and out of balance, or a clogged filter dryer? These too can change the pressure in your system and make your central air conditioner freeze up.
But which is it, and how do I fix it? How to troubleshoot an air conditioner that is freezing up will be discussed in the next section. However, if you’ve already determined that it’s time to replace, make sure that you don’t overpay. This program will save you money, help you avoid the scams, tricks and traps of predatory contractors, and accept or reject bids with confidence:
Just because your air conditioner is freezing up does not mean that you have to call your HVAC contractor! Some contractors will tell you that they are the only ones that should touch your AC unit (I have never believed that), and if you don’t feel comfortable around your air conditioner then you should definitely call out a contractor. Either way, the first thing you need to do is turn your air conditioner off and allow it to defrost. Ice can harm your air conditioner! Next, if you do feel comfortable and if you have even a basic touch of the handy-man bug, then there are a few things that you should take a look at before you call your local air conditioning repair service. In order to troubleshoot a frozen air conditioner, I’d recommend you do the following steps in order:How to save an email as a pdf How to increase sex drive men? How much does it cost to spay a cat what does herr mean How to turn off google assistant tips When do penis tips come out? what does the pronoun she they mean what does reset network settings do How to teach your dogs to do tricks what one piece character are you What tricks can you teach a parakeet How to talk to anyone 92 tricks what does chino mean in spanish How to connect airpods to samsung? How to download optifine? How long does lasagna take to cook what does a water bug look like How to texture a wall? How much do fine dining servers make in tips 2 word magic tricks where the first word starts with b what does boogie mean what do green messages mean How to do tricks watch dogs 2 How to draw abs what does it mean when you crave sweets How to turn on wifi calling? what does an mri show in the back what time does ulta close today what are feelings How many tips of grapes what does it feel like to have a heart attack what!? my neighbors are demons!!? When do you get tips from doordash what does re mean in email what are the five themes of geography what does a disability approval letter look like what does inactive mean on roblox Tdjakes how to resist the seducing tricks of satan How to build a mansion in minecraft? How to cut layers in hair? How to conduct an interview What tricks to teach cockatiels How long to sear steak? what does two impeachments mean How to make pp bigger? what time does game of thrones air on hbo go what does fbgm mean what does rejoice mean How to do wakeboard tricks videos What the best way to cook asparagus tips what does personal mean what does rma mean what does it mean when your triglycerides are high How to clean ear bud tips How to reverse prediabetes? What does it mean when the tips of a plants leaves turn brown How to keep a steady beat for beginner clarinet tips what does 111 mean angel numbers what pools are open near me Tips on how to get good at reselling How to make shoes not smell Gatsby tricks daisy to believe what about him Who does the skateboard tricks in apple watch what does chino mean in spanish what does asada mean How to clean a toaster? what do green eyes mean what does it mean when you see an owl what does ips mean How to tell if chicken is bad? what does ta mean How to stop stuttering? How to apply tips on toenails What are tricks to get your partner to ejaculate How to find the inverse of a function? what marvel character are you What is it called when a webdesigner tricks you to go to there website How to put on cologne? What are glass tips for what does solicited mean Tips on how to become anorexic Tips on how to stop popping your knuckles what does mbn mean in text what does am and fm stand for what happens if you are caught vaping under 18 what does systolic mean Who serves rib tips near me How to clear browsing history what does it mean to be a millionaire what does texas a and m stand for what is blue heart mean How to write wedding vows? How to find the mean in math what fye mean What are q-tips meant for what does your mean what does asf mean in text How to sharpen chainsaw chain what does hospice mean what does an abnormal pap smear mean what does coughing up green mucus mean Tips on how to save on your energy bill