Like we talked about, to have a good cooling inside the car and not the undesirable hot air, we need a constant pressure. If the outdoor unit loses electricity for some reason, or if your outside AC unit is not running but your inside unit is, your home’s fans will just blow air through an inert machine. While this may seem silly, you would be surprised how often this is the culprit! Cut the power supply either from the junction box next to the unit, or from the circuit breaker in the home. When this happens, you’ll feel nothing but warm air. Its job is to cool the warm refrigerant, and that makes the air cold when it reaches the evaporator. © Copyright 2021 ABC Home & Commercial Services All Rights Reserved. There are many possible reasons your air conditioner could be blowing warm air. Without enough refrigerant in your system, the evaporator coils can’t absorb heat. So, without us looking at your air conditioner, there’s really no way for us to know exactly what’s causing your AC to blow warm air. “ON” means the fan is always blowing air through your vents, even when your system isn’t working to cool the air it blows. Most likely, if you’re having issues with your air conditioner blowing hot or warm air, it’s either a problem with the compressor/outside unit or your air conditioner is low on refrigerant. The Air Conditioner Blows Out Hot Air. A compressor that shuts off unexpectedly is usually the result of a tripped breaker or a blown fuse. The blower fan in your air conditioning is a separate electrical system from the cooling unit. To troubleshoot this issue, turn off the AC for 24 hours and set the fan to On or Fan Only to run warm air over the coils. As a result, you’ll feel warm air coming from the vents. A dirty … Although it’s almost always in your best interest to contact a professional when in need of air conditioner repair, there are some is some maintenance you can try while you wait for your professional to arrive. This then leads to the evaporator coils freezing, resulting in your house AC blowing warm air. If your AC is blowing hot air, the thermostat may have been accidentally set to “heat.” If this is the case, it’s easy to fix on your own. Losing refrigerant means losing your cool. If it’s clogged, it will do more harm than good. However, if you have been exposed to refrigerant, you may begin to experience signs of refrigerant poisoning, which include headaches, dizziness, nausea and, in severe cases, breathing difficulties and loss of consciousness. You may just have to change the air filters or hose down your outdoor unit. Remove weed and debris surrounding the unit and hose it down to remove caked-up dirt. The first thing you should do if you feel hot air coming from your vents is to check your thermostat to see if your thermostat is set to “heat” instead of “cool”. As a safety measure, all AHWA employees experiencing COVID-19 symptoms will be required to self-isolate. As the air conditioning system cools down, the blower fan pulls the warm air from inside of your home, runs it through the air conditioning system, and then blows the now cool air back … AC blowing warn air intermittently. If this is the case, be sure to take it into a mechanic as quickly as you can. No matter what is the cause of your malfunctioning unit, you can rely on ABC Home & Commercial Services to get your system up and running again. Since i could no longer suffer the 100 degree San Antonio summer, caved in for the $ 1500 repair - R&R compressor, condenser with drier, transducer switch and Evac & … While cleaning your condenser coils is a relatively easy task, most homeowners don’t have the tools to properly clean these specialized parts, so many homeowners leave this job to the pros. This is sometimes called a “flooded” evaporator, a problem that will also leave you with warm air. Ran diagnostics at independent AC shop in San Antonio, TX: compressor internal valve is sticking and intermittently pumping. A home’s outdoor unit runs on a separate electrical supply than the fans inside the house. This means it’s important to be able to recognize the signs of low refrigerant. I Looked Under the Hood It took some looking to find the condenser and condenser fan. If you’ve already checked your thermostat, it may be time to clean. This is the most common reason why your air conditioner is not … As part of the outdoor unit, they are frequently exposed to the elements and over time, dirt and grime accumulate on the coils. Clogged filters. Solution: If you suspect that the low refrigerant in your AC is due to a leak, call your technician right away. Remember, refrigerant isn't used up like gas. Generally speaking, the air coming out of your unit will be roughly 20 degrees cooler than the standing air inside your room. If this line gets blocked due to debris or dirt, the water can go back and damage the AC’s system. Warm air coming from your air conditioner on a humid day makes staying in your home simply unbearable. To avoid this inconvenience, it pays to know the usual causes of air conditioner problems. A refrigerant leak should always be fixed by a licensed technician. You can always do some troubleshooting to see if the settings in your thermostat are wrong. That being said, there’s no harm in double-checking to see if the breaker has been turned off. Refer to the list above for more information about the other possible causes of an air conditioner blowing warm air. It can even interfere with how your thermostat works. Check your air filter regularly to make sure there’s no dirt and debris buildup on it. Again, you won’t want to use this as your only diagnostic method but it can be a good first step if you’re not sure whether something is truly wrong. Before we begin, it’s important to have a good understanding of the air conditioning system. Here are the steps involved: Turn off the power to your unit. You shouldn’t necessarily take a deviation from this to mean that your air conditioner is malfunctioning, though; make sure you investigate more thoroughly. If you detect either of these noises coming from your air conditioning unit, you’ll want to call a licensed professional to come take a look. Hello. You will start noticing this with your AC blowing warm air in the house. Some of the tell-tale signs of a leaking refrigerant are hissing or bubbling noises and a buildup of ice on the outside unit. A refrigerant is essential to maintain your unit’s best performance. This can easily happen on accident when cleaning or when kids are playing nearby. Any suggestions? Clogged Air Filter. That means that the only air that can blow over the evaporator coils is the air inside the unit itself. With the temperature reaching 110 degrees from June to August, you will definitely need your unit working and in tip-top condition. After running errands, playing with the kids outside or taking the dog for a walk, we expect to open the door and enter a nice, cool atmosphere. Look at your refrigerant and thermostat first before moving on to your evaporator coils. If you haven’t cleaned the coils in a while, check out this post for some tips. Electrical problems are rarely a good fit for a DIY solution, especially with a power draw as high as an air conditioning unit. It is important that warm air gets to circulate around the coils for them to work properly. The refrigerant lives in a closed system and the amount is supposed to remain constant. Over time, condenser coils get dusty and dirty, due to rain, wind and other conditions. This buildup of dust, leaves, dirt and vegetation can make it difficult for your condenser coils to push air outside. I checked the A/C Freon level with my gauge and it's full. When the system starts blowing warm air, turn off the AC for a few minutes. I don’t drive every day. Fortunately, if you have all the right tools, cleaning your condenser coils isn’t too difficult of a task. In order to allow your system to stop shutting off, you can simply clean the unit. This will tell you whether your air conditioner is producing air roughly 20 degrees below the temperature inside your house. Air conditioning intermittently not blowing cold air. A low refrigerant level will cause many problems, and being able to identify the signs of low refrigerant can help you catch needed repairs before the situation becomes a much bigger problem. Dirty air filters cause warm air just like blocked air returns do. If you’ve ruled these possible causes out, troubleshooting gets a bit tougher and more complex. Another symptom of low refrigerant is frozen evaporator coils. The condensor fan unit outside turns on and runs but mostly I don't get cold air on hot days, 95 deg+. Fresh air can’t make it inside the unit and it starts to struggle. Before we dive into the repairs of a system, keep in mind there is often a simple reason. If there are holes in the ducts, the air winds up inside the walls, a scenario you will not want to happen. The low-pressure refrigerant absorbs so much heat at the coils that water vapor freezes to them. There’s nothing quite like the cool relief our air conditioners bring us on hot summer days. If it is still going, but with speed reduced, call a professional service person and have it checked. If you get close enough to the leak, you might be able to hear a hissing or bubbling, depending on the location. Your air conditioner’s condenser coils are responsible for removing heat from air and expelling it outside your house. The first thing to check is the levels of Freon in the system. What is causing this and what is the solution. While this may seem like a simple fix (after all, you can flip a breaker, right? Heating and cooling technicians understand how to recharge refrigerant and how to seal gaps without risking the rest of your unit. We hope this won’t impact our service and we will remain open for business until further notice. But if you’ve set your fan to be “on” at all times, it’ll blow cold air during the furnace downtime. Five minutes of research on the Internet revealed that the most common reason for A/C blowing warm air at idle is a condenser fan that's not working. One of the most common explanations would be that the unit is running low on refrigerant. Lower refrigerant levels in your unit will first lead to the air conditioner being less efficient. Refrigerant is never supposed to “run low.” A leak means that more refrigerant needs to be added and AC repairs need to be made. Thanks. Do you want to make sure your AC unit doesn't go out in the dog-days of summer? The final issue that can cause warm air to come out of your air conditioner is low refrigerant. This is why it can come as quite a shock when you step through your door only to find that your house is warm. The point is, the A/C comes on only after you have been driving for like an hour. Contrary to what you might think, too much refrigerant flowing into the evaporator doesn’t lead to cooler air. A dirty condenser coil can cause other problems, too. There are several reasons why the fans in your AC unit do not work properly. Once it’s on, it works perfectly. And, while that can help improve air quality if you have a whole-home air cleaner installed, it could also be the reason why you feel warm air (or at least air that isn’t cooled) blowing … Feeling a bit frustrated? Your AC could be blowing warm air for a lot of reasons. We know the feeling. If I'm parked it will get warm and sometimes it stays blowing cold. outside AC unit is not running but your inside unit is. That said, there can be problems associated with your refrigerant level. Again, not something you want to try to deal with on your own, as refrigerant can be dangerous if inhaled. This leads to mold growth if not discovered right away. From there I went home, shut it off and about fifteen minutes later left for work but this time the AC was blowing cold. When was the last time you changed your air conditioner’s filter? In my 2012 Camry the heat or ac will blow one day then not the next. A flame sensor that’s covered with grime or worn out can cause the burner to keep shutting off. With most A/C problems, low Freon levels tend to be the primary problem the vehicle is having. Frozen evaporator coils can then cause your air conditioner to freeze up, which leads to even more problems with your system and its parts. However, you'll need a professional to figure out if this is the problem. A leaking refrigerant is a health and safety hazard, so it is important to have it fixed as soon as possible. When Freon starts to get low, the A/C can start intermittently blowing out cool air—particularly when it reaches a certain speed—and blowing hot air at other times. Solution: Clean the outdoor unit regularly to give your condenser ample room to breathe. Refrigerant relies on pressure to shift between liquid and gas forms. You’ll need a visit from an HVAC professional to make this furnace repair. With a programmable one, you can keep the temperature inside your home consistent every time. Refrigerant level low. In a worst-case scenario, the water leaks and goes through the walls and ceilings, as well as furnishings. However, they work together as a team. If too many appliances running at once caused the breaker to trip, you can try flipping it back on to see if that works. Cold Air Blows Intermittently Air Conditioning and Cooling Systems - Home A/C Periodically Blows Warm Air - Then Blows Cold After 30 Minute Restart - This is an ongoing problem, which I've … Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air again. Outside condenser coils are fairly clean and in decent shape. The consequence is that your air conditioner turns into a fancy fan for room temperature air. When your air conditioner coils are covered in dirt and debris, heat may not be transferred out of your home properly. In this case, the easiest option is to reach out to a professional. Ducts run through your walls and ceilings, carrying the cooled air from your AC unit throughout your home. If the filter is dirty and unclean due to dust, the passage of cool and warm air inside the ducts is blocked. More often than not, the best way to solve this predicament is to ask help from a professional. Just like the other appliances, your AC unit needs to be monitored and regularly cleaned to avoid issues. When this happens, your unit will release warm air, or sometimes no air at all. In gaseous form, refrigerant has no smell or color which can make it difficult to detect. Unfortunately, fixing this is not as simple as replacing the refrigerant. If there is a sudden climb in your energy bills this summer, you may want to check on your home’s ductwork. Here are the steps involved: Most of the problems we’ve discussed thus far don’t have much of an impact on you and your family, aside from the fact that you may be uncomfortable in your home and have abnormally high energy bills. If you detect your home AC blowing warm air, it may be due to problems in the thermostat. A large restriction of refrigerant will also result in your A/C blowing warm air. Clogged air filters can cause various problems in your unit. Solution: Some clogs are relatively easy for you to fix. Solution: Consider a programmable thermostat. Also, all technicians visiting customers’ homes will be equipped with gloves and masks. Some of the problems in your AC unit can easily be solved. You can also use a vinegar solution once a month to avoid any build up in the drain lines. Finally, on rare occasions, there may be a pinhole leak somewhere in your system that allows refrigerant to escape. If the problem persists, you may have your thermostat replaced or recalibrated. There are easy steps you can take to prevent these setbacks from happening in your home or business space. #326306 With this, you will never have to experience your AC blowing warm air in the house when summer comes. It can also lower your energy costs. Almost all the causes of air conditioner problems can be prevented with regular maintenance. Our licensed specialists can help with any heating and cooling service you may need, whether you want advice on how to change your filters, if you’re dealing with a refrigerant leak or if you have another problem entirely. Older control systems tend to malfunction easily. Fixing this problem may be as easy as opening or unblocking the return vent. 2012 Camry ac or heat blower works intermittently 1 Answer. Having air conditioner problems during summertime is an experience you will never want to undergo. And that eventually cools the refrigerant. If not promptly fixed, it may even cause damage to the compressor motor. 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