To protect the components of over current, they placed a fuse. Basically inside AC is blowing air but it isn't cold. But, when your thermostat’s fan setting is set to “ON,” it means the fan is set to run 24/7—even when the air isn’t being cooled. You may also have a return duct that is broken or disconnected and is pulling in unconditioned air from outside or an attic space. In other words, that is the role of the condenser in the system. Rather have a pro take a look at your AC system and determine the issue quickly? Solution: Check your breaker box and see if the unit’s breaker has tripped (moved to neutral position). For this reason, it uses good connections, and proper quality wires. That’s how you get chilly air inside your car! Dirty air filter. Being an active component that is mechanically connected by the engine with a belt, it wants to work all the time. Change your thermostat to “auto” if it’s currently set to “on” to avoid this. You might not think your filter contributes to … If the breaker trips again, DON’T reset it. What Are The Symptoms Of A Bad Crankshaft Position Sensor? Firstly, all the connectors should be perfectly locked and are not loosened. We can call the compressor the heart of the air cooling system. After turning the air conditioner on, cold air was not coming out of the unit. can coat your outside AC unit. Room air conditioners are also designed with a thermostat sensor (located behind the control panel), which measures the temperature of the air the unit is blowing out. A clutch is used to engage or disengage the operation of the compressor. If you’re noticing that the air coming from your AC vents is only warm/hot sometimes, this is likely your issue. Save my name, email, and website in this browser for the next time I comment. The newly formed liquid is circulating through the dryer to eliminate any form of gas, because is not wanted in this part of the system. Therefore, if the relay it’s not working properly, the electrical circuit it’s not closed and there is no current to engage the clutch. Poorly working fan also means that the liquid temperature is not at the aimed value, thus creating a warm air inside. What Are The Symptoms Of A Bad MAP Sensor? Air Filter Is Dirty. In a properly working air conditioner, a fan will draw air over the evaporator coils, where it is cooled, and then be re-circulated back into the room. Fixing this problem may be as easy as opening or unblocking the return vent. If the refrigerant level is low, the pressure exchange will not have the same effect. It’s the one that’s pumping the gas that is going to turn into liquid. This will increase car fuel consumption. If breakers trip after resetting or the breakers are on normally yet warm air blows through your vents, give us a call to schedule air conditioning repair. The dirt, dust, particles and the contaminants, get accumulated in these air filters. A broken condenser means that the gas might be still turned into liquid, although the temperature is higher than the desired one. The air conditioner pump, called the compressor, sucks warm air out of your home, removing it outside with the help of a special fluid, refrigerant. It turns out your air conditioner has some technical issues. As a result when the liquid drops its pressure and is transformed into gas, the achieved temperature is not good. If you live in Arizona, the last question you want to ask yourself during the summer is, “Why is my air conditioner blowing warm/hot air?”. Is hot outside and your AC blows warm air in car? When there is debris blocking the outside of your AC unit, your AC will struggle to cool your home’s air efficiently. This one is also a part of the clutch’s electrical system. Fresh air can’t make it inside … Secondly, check for obvious damages to the cables. Your email address will not be published. Each of these problems has its own level of gravity thus different costs of repairing. A refrigerant is a fluid that is transformed from liquid to gas and vice … Over time, debris like leaves, sticks, dirt, etc. If your unit is not blowing any cold air, the sensor may have been knocked out of its position. That cold gas travels back to the compressor where the whole process starts again. To find the true problem, you’ll need a professional A/C technician to check out your AC system. Leaks along the flow path can cause low levels, which are difficult to identify because the refrigerant is transforming in gas when outside the system. Thirdly, there are electrical wires and connectors that might cause intermittent issues. Now, this may sound counterintuitive, but to properly cool your home, your thermostat’s fan setting should be set to AUTO, not ON. It will cause components to work harder to achieve correct values. 6. TheCarsGuide.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Solution: Check your air filter at least once a month and change it if it’s dirty. Learn more in our article, “Dirty AC Condenser Coils: Why You Need Them Cleaned in Phoenix.”. There are many different reasons why your AC is blowing warm air. What Are The Symptoms Of A Bad Voltage Regulator? Don’t always think about the money spent on fuel because buying a new compressor will cost you more than this. “Car ac not blowing cold air when hot outside” or “car ac not cold enough”: This happens due to two reasons. The fuse is placed in series with the other components in an electrical circuit so it can open the circuit in case of an issue. Heater fan blows the air from the outside over the evaporator which cools down the air that it’s entering the cabin. If that’s not what is causing it, check the engine’s condenser. Lightly vacuum the evaporator and condensing coils to remove any potential clogs. Your air conditioner has 2 components: the indoor air handler, and the outdoor condenser unit. Your air filter traps dust and debris in the air so that the inner workings of your AC system (and the air you breathe) stays clean. The Clogging of Air Filters – AC Not Blowing Cold Air. If you’ve already checked your thermostat, it may be time to clean. We want a lower pressure only to transform the liquid in gas, not on the high-pressure part of the system. For instance, if the compressor is not engaging when you press the AC ON button and everything else, it’s excluded. The outside unit’s job is to disperse heat gathered from your home’s warm air and release it outside. Your AC actually cools your home’s air by removing heat from the air inside and dumping that heat outside. Like we talked about, to have a good cooling inside the car and not the undesirable hot air, we need a constant pressure. The next step will be to schedule an air conditioner repair and allow a trained professional to fix the issue. The most common cause of window air conditioners not blowing cold air is a lack of adequate air flow. If that setting is set to inside/ Cabin Air (recirculation) you are not getting air from outside, instead you are just recirculating air within the passenger cabin. It does this through a heat transfer liquid called refrigerant. The most common reasons that AC blows warm air in car are leaks in the air cooling system, broken compressor, worn-out clutch or electrical wiring problems. Your air conditioning unit has two breakers: one for the outside unit, another for the inside. Your last option is to turn on the air conditioner to beat the hot weather. The fact that the outside unit is running and air is blowing inside suggests that it's not a problem with the thermostat. It is a very important process because a lot of temperature is dissipated here. Without a working compressor your ventilation system will still work, but you will never get cool cold air. How can you fix an AC that blows warm air? Encased in a closed metal loop, this refrigerant offers a shuttle for this heat exchange. A dirty evaporator coil will cause your AC to blow warm air. So why is blowing warm air inside the car? An air conditioner does not blow hot air. Without this being fully functional, it does not cool air at a low temperature. At the same time is also responsible to deliver the gas back into the compressor so that it can repeat the whole cycle. I had it serviced about 2 months ago and all seemed fine at that time. Therefore, it’s a good idea to turn it on every couple of weeks to keep it in a good state. The Room Air Cycle. Your Air conditioning system might fail to blow cold air if you have not change the air filters for quite a while. A broken AC system that blows warm air in the car is a problem that needs to be solved for the satisfaction of cold air. Check exhaust hose for kinks or blockage: If hot air can’t get out of the vent, the air conditioner won’t be able to cool off your room air. Your system is most likely a heat pump. Your air conditioner blowing hot air out the vents could be caused by a variety of problems,  ranging from simple and cheap to more complex and expensive. If a duct … The reason the fan shuts off during this process is so the system doesn't pull the cold air from the outside across the coil while the hot refrigerant circulates. Check the car electrical schematics to find the location of the fuse and test it if you have the proper knowledge. I checked out the outside unit and made the following observations: 1. Your compressor sits inside your outdoor unit and plays a huge part in the AC’s “heat transfer” process. If your AC is blowing cold air out of the top vent, but your room still isn’t getting cold, your room is probably too hot or too large for the heat capacity of your air conditioner. DON’T turn your hose to full blast or you’ll bend the condenser coil fins, which could potentially affect airflow. Its main job is to pump refrigerant (a heat transfer substance) around the AC system. Refrigerant level low. The same effect can have a blockage. Thus, a slipping clutch is a problematic component. It’s up to you how you maintain the system and how much care you have! Although you can easily fix it by refilling the refrigerant level, it might happen that the compressor is broken since you did not use it in a long time. But, pinpointing the exact reason could be a little tricky. While the system is in cooling mode, the frost that had built up on your outdoor coil then turns to water, runs down the outdoor coil, and piles towards the bottom. A defect can be hidden, and as an effect, the fuse is blowing. Check the exhaust hose and remove any obstructions inside the hose, and keep the hose unbent. In conclusion, it means that is a very important part of the whole system. Possibility #2: Reasons your heat pump is actually blowing cold air. So you decided to go back inside, but you still feel warm. For instance, a broken compressor it’s not able to keep a constant pressure in the system. A coil is inducing a magnetic field that is causing the clutch plate to connect to the compressor shaft. We’re the most trusted HVAC professionals in the Phoenix area, and we’d be happy to take a look at your AC system. There are 2 places an outside AC unit can lose power: At the circuit breaker. Solution: Turn your fan setting to “AUTO,” this will ensure the fan automatically turns on only when your AC has cool air to blow into your home. As a result, is more vulnerable to the outside environment. Because of the need to capture the refrigerant and licenses to get the refrigerant in most places, this typically isn't a DIY job. 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 thermal expansion valve is the place where the high to low and vice versa transition is done. Discern a duct malfunction. Solution 2: If you want to get your outside unit properly cleaned (and prevent AC breakdowns),  you’ll need to invest in air conditioner maintenance by a professional. Dirty AC Condenser Coils: Why You Need Them Cleaned in Phoenix. In a central AC system, the main blower forces cold air through the ducting and from there into individual rooms. If the outside unit loses power but the inside unit doesn't, it is possible that you could experience warm air coming out of your air vents. The relay it’s based on a mechanical circuit so you can slowly knock it to see if the clutch it’s starting to engage. The above 5 issues are just a handful of problems that could cause your A/C to blow hot air. The condenser is the first component that is cooling the gas and as an effect this one takes liquid form. But when you leave your air filter in for too long, it gets clogged full of dirt and becomes worse than useless—it can do real damage to your AC. Your thermostat’s fan setting controls the fan in your AC’s inside unit (called the air handler). Compressor is hot to the touch (not scalding). A plugged metering device or a malfunctioning metering device can cause the air conditioner or heat pump to stop cooling. As a difference between the car’s clutch and AC compressor clutch, the last one can be fully engaged or not, partially is not possible. dirty air filter blocks air from reaching your indoor AC unit. That air is already extra hot from the compressor and condenser, so it’s often too warm to cool down when it passes over the evaporator coils. Solution 1: Clean the outside unit at LEAST once a year using a garden hose on a gentle setting. This might be an easy and inexpensive fix of the AC blowing warm air in the car. Some common reasons your AC is blowing warm air include: Let’s go into each of these issues in more detail. In effect you can say that if something is wrong in this assembly, the clutch will not engage and thus the compressor will not function. A dirty air filter clogged with dirt can decrease the efficiency of your Air … Like we said above, the compressor is connected to the engine via a belt. Generally, you can do a visual inspection of everything. The high-temperature liquid can escape through a small hole, therefore transforming it into a gas. Try to fix it first, before buying a new AC compressor which can be expensive. Solution: Schedule a professional AC repair if you think your system may be low on refrigerant. Heat is absorbed by refrigerant in your indoor AC unit and is then carried outside where it’s dumped into the outside air via your outdoor unit. The above 5 issues are just a handful of problems that could cause your A/C to blow hot air. Dirty Working Conditions. Here the pressure drops approximately 10 times lower. Required fields are marked *. As a result, you’ll feel warm air coming from the vents. AC maintenance is just like getting maintenance for your car (except instead of every 3,000-6,000 miles, it’s twice a year). The circuit breaker power: at the same time is also a of! A cooling system make use of cables and connectors that might cause intermittent issues new compressor will cost you than! 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