There’s nothing worse than sitting in your home and realizing that your air conditioner is blowing hot air--especially during the sickeningly hot summer months. Even though It’s not summer yet, you don’t want to look for answers for why your air conditioner isn’t working when you’re burning up inside your home. It’s best to know the reasons ahead of time so you’ll know how to avoid them or when to call a professional. So why is your AC blowing hot air? Here are 4 common reasons: Ok, this might be a huge “duh” but if you’re getting hot air, you might have accidentally flipped your thermostat to “heat” mode. It happens to all of us. If that’s the case, switch it back to “cool” and you’re good to go. Chances are, your thermostat is set to cool, and you’re still getting hot air. The cause could be a dirty evaporator coil caused by a dirty air filter. This keeps your air conditioner from properly cooling your home. You can change the filter, but you'll need a professional to clean the evaporator coil.

Walk outside and look at your air conditioner’s outside condenser unit. What do you see? Is there anything blocking the condenser coils air flow? how long does it take to fix an ac unitAre they blocked with dirt and debris?ac unit purchase If so, this seriously impacts your air conditioner’s cooling ability.home central air conditioner installation Cleaning the condenser coils needs to be a regular activity during the summertime. This is the usual culprit. Your air conditioner needs a proper refrigerant (usually Freon) charge to cool your home. So a Freon leak can leave you feeling the heat since you’ll have a complete loss of cold air. You can tell if your air conditioner doesn't have enough Freon if ice forms on the inside and outside units.

Getting a Freon charge is best left to a professional. Keeping an eye on these problems will not only will this keep your air conditioner from blowing hot air, it will also prevent a costly breakdown. And the last thing you want is a breakdown during summer. So it only makes sense to get preventative maintenance done during the spring before it gets too hot. If you live in the Atlanta, Georgia metro area, give Coolray a call. We have been serving Atlanta, Marietta, Alpharetta, Kennesaw, Lawrenceville, Roswell and the Atlanta metro area since 1966. Contact Coolray online to get maintenance done on your air conditioner. I have two AC Units. One for upstairs and one for downstairs. The upstairs one works just fine but not the downstairs. So, i did a test by turning both units on and went outside to compare the two units. The upstairs one works fine and blows out warm/hot air, but the downstairs one seems to blow out cold air compare to the working unit. These two are not heat pumps.

They are both AC units. Anyone know what is wrong with my downstairs unit? BTW: I had the HVAC guy come out to check it 3 years back, and he added refrigerant into the system. It worked for a week or two after he left, then it's back to warm air again. Would this be a leak of some sort? Because of the need to capture the refrigerant and licenses to get the refrigerant in most places, this typically isn't a DIY job. The fact that the outside unit is running and air is blowing inside suggests that it's not a problem with the thermostat. Check the breaker, air filters, and any other easy to access components for obvious problems. Beyond that, there are a lot of possible issues: No refrigerant or not enough Controller has failed or wiring has become disconnected Inside coils have frozen over Since the first two are the most likely and either will need a professional to repair, you may as well get one out to diagnose the problem for you. It's either a dirty unit or a capacitor problem.

If the unit is very dusty you need to clean out the dust to let it breathe. If the capacitor went bad, when you look at it the top will be bubbled up. Most likely it's the capacitor. Change your filters: a dirty filter is what an AC mechanic loves; it's money in the bank for him.Browse other questions tagged repair hvac air-conditioning or ask your own question.Written Written AC may blow hot air initially for a few minutes, but is not supposed to blow air 'After' a few minutes. The AC works by shutting down the compressor when ambient temperature is reached. When the compressor shuts down, the indoor unit fan continues to circulate the air without cooling it. So the air may not be cold but it will be same temperature as room temperature (may be half a degree warmer)Blowing of hot air may indicate the followingFaulty Thermostat: Get it checked by authorized technicianVoltage fluctuation may be shutting down compressor : Get a good voltage stabilizerGas leakage may reduce refrigerant pressure.

IF gas is really low you may get  ice crystals falling out of the indoor unitDirty filters may cause the problem. Please clean the removable filters and get your AC "wet serviced" at least once a yearMaybe the compressor oil is leaking which may cause it to mover heat and shutdown quicklyIf the problem is persistent then contact a authorized technician to look at your AC unitWritten I’ll bet you are talking about automobile AC. The most likely reason for AC to cool initially and then blow hot is that the AC is tripping out on some safety such as high head pressure. The fact that it cools upon start indicates that the compressor is functional and probably has adequate refrigerant. Sometimes the safeties on an AC system become faulty causing system shutdown.It seems obvious, right? Your air conditioner makes your home cooler. Well, while this is the eventual outcome, your air conditioner actually does much more than that. We’re going to talk about the four main functions of your air conditioner and how it performs those functions to cool your home.

Believe it or not, creating “cold” isn’t actually a thing. Cold is just how we describe a lack of thermal heat. Your air conditioner does not “create” cold air, it removes heat from warm air. So, how does your air conditioner remove the heat from the air in your home? The Air Conditioning, Heating and Refrigeration Institute (AHRI) describes how this works in great detail. But we’ll try to simplify it. Your air conditioner has three main mechanical components to cool your home: Basically, the air in your home moves over the cold evaporator coil that’s inside your home, which absorbs the heat from the air with refrigerant (a heat transfer fluid). The refrigerant in that coil then flows to the warm condenser coil. There, the compressor compresses that refrigerant to make it really hot, hotter than whatever the air is like outside. This allows the air outdoor to absorb the heat in the refrigerant that’s flowing through the outdoor coil until the refrigerant cools down and flows back inside where it can absorb more heat.

The refrigerant flows back and forth until your home reaches the temperature set my your thermostat. So, why does this matter to you? Because when these coils get dirty, your air conditioner works less efficiently and cost you more money as a result. This is partially why you hear people saying you need to get your air conditioner checked at least once a year for a tune up. Obviously, your air conditioner does not just absorb heat from the air and release it outside. It also has to move the air. That’s why there is a fan, which circulates the air from your home through a vent and blows it over the cooled evaporator coil. This cooled air is then blown through your air ducts, which are connected to all the different rooms in your home.Because there are options for how your air conditioner moves this air. For instance, there are now variable speed blowers that pick the most suitable speed based on the current conditions instead of constantly turning on and off. These variable speed blowers save you money on your electric bill and increase the comfort of your home by circulating your air for longer periods.

So if you’re thinking about getting a new air conditioner, this is an option you should consider. Hot air can hold more humidity than cold air. That’s why you see water droplets on a cold glass of iced water, because the air around the glass drops in temperature and the amount of moisture it can hold drops. Thus the moisture in that air condenses until it turns into water droplets So what does this have to do with air conditioners? Recall when we talked about the hot air being blown over the cold evaporator coil.  When the hot air is blown past these coils, moisture from the air condenses onto the coils and is captured. That’s why your air conditioner has a drain pan and a drain line for all the moisture it captures. So why does this matter to you? If the drain line ever becomes clogged, there will be a water overflow, which can cause drywall damage and even mold. Call a professional if your air conditioner’s drain line gets clogged. Finally, your air conditioner cleans the air because it has to filter the air flowing from your home to the air conditioner.