What Conditions Can Cause the AC to Freeze Up? Here are the top reasons for a frozen window air conditioner and how to solve the problems when possible without having to take it to a pro for repair or buy a new one. 1. Poor Airflow – Dirty Air Filter . The number one cause of a frozen window AC is an air filter …Thaw the Unit. If your air conditioner freezes, your first step is to thaw it. Doing so is a simple matter of going to the thermostat and turning off the unit completely. Give the air conditioner a full 24 hours to defrost and then run only the fan for a few hours to dry things out. Some HVAC technicians feel that the AC will thaw more quickly ...Jul 31, 2023 · The airflow in your unit may be obstructed, limiting the system's ability to absorb heat. Alternatively, a low refrigerant level can cause the temperature to drop too much, leading to freezing. Other causes may include a dirty air filter, mechanical issues, or faulty thermostats. To fully grasp the reason behind your air conditioner's freezing ... 01 - Dirty Air Filter. If the air filter becomes clogged with dirt, it restricts airflow over the evaporator coils. If the airflow is reduced, the evaporator coils get too cold, which then causes the humidity in the room to condense on the coils and freeze. As frost accumulates on the coils, the frost restricts the airflow even more.The scenario for an air conditioner coil freezing up goes something like this. Your air conditioner or air conditioners were working and gradually, over the course of a hot day with high humidity, airflow out of your ceiling vents first drops off and then falls to zip. Finally the compressor may stop running and it seems as though the air ...Step 1 - Power Off the Air Conditioning Unit. When your HVAC services professional arrives to check your clogged AC drain line, they will likely turn the system’s power off, even if it is already not running. This is for the safety of the technician as well as to protect the HVAC system from additional condensate …We do not fix the symptoms causing your air conditioner to keep freezing over, we fix the problem itself. Sometimes cleaning the filter or unclogging the coils ...Clean the Filters. One of the common reasons for an air conditioner to freeze up is restricted airflow due to dirty or clogged filters. To maintain proper airflow and prevent your AC from freezing: Check the filters regularly: Inspect your air filters at least once a month, especially during the peak usage months.Troubleshooting guide for A/C's Icing up using a °CoolBot ContollerOct 6, 2023 · Your air conditioner may be freezing up outside due to a few reasons such as inadequate airflow, low outdoor temperature, improper refrigerant levels, dirty or blocked air filters and vents, damaged or faulty wiring, a clogged condensate drain line, or mechanical problems. Regular maintenance, ensuring proper airflow, and maintaining correct ... The coil will freeze up under these conditions and will require time to thaw out before you can turn it back on. If you continue to use your system without proper airflow, you risk causing significant damage to your compressor. When it comes to airflow problems, there are several tasks that need to be done. First, you should inspect the area ...How to fix a Goodman air conditioner that keeps freezing up.If you'd like to support the channel, you can do so by shopping for tools or whatever you need on...Possible reason #1: Low airflow over evaporator coils. Your air conditioner uses very cold refrigerant to absorb heat and moisture from the air inside your home. This heat exchange takes place at the evaporator coils (the part that’s frozen). And as warm air passes over those cold refrigerant coils, the coils absorb enough heat to prevent ...How moisture contributes to the problem. The 3 top reasons why your AC freezes up. - Lack of Proper Airflow. - Dirty Evaporator Coil. - Low Refrigerant Levels. How to prevent an AC system from getting frozen. - Change the air filter. - Clean your evaporator coil. - Get an airflow inspection.A clogged or excessively dirty air filter and a frozen or dirty evaporator coil can have the same effect. Cleaning or replacing the air filter may help, but cleaning an evaporator coil requires an air conditioner service call. Weak or no airflow: Two-stage or multi-stage cooling systems often run for longer periods of time on a …How to fix a Goodman air conditioner that keeps freezing up.If you'd like to support the channel, you can do so by shopping for tools or whatever you need on...May 28, 2022 ... 1.Clogged Air Filter. One symptom that causes a majority of air conditioning issues is a dirty air filter. When your air filter isn't cleaned ...What Causes Air Conditioner to Freeze Up. 1. Dirty Filter. 2. Too Many Vents Closed or Blocked. 3. Thermostat Set Too Low. 4. Running AC When it is Cool Outside. …Nicholas Longo. Updated: June 12, 2023. Why is my AC freezing up? How can I fix it? Air conditioners are a staple in many homes, especially during the hot …1. Turn the AC unit Off. When you notice a buildup of frost on the unit or a restriction of airflow from the vents surrounding your home, power off your air conditioner unit. If you find that the a/c unit is already frozen up, doing so will allow warm air to blow over the evaporator coil, allowing it to thaw out. 2.Top 5 Air Conditioner Malfunctions that Could Cause it to Freeze. 1. Restricted Airflow. An air conditioning unit depends on the continuous flow of hot air into the unit and out of the unit to operate efficiently. If the airflow is restricted, it can cause the refrigerant to cool down to a freezing point.Learn why your air conditioner line can freeze up and what to do when it does. Find out the common causes, such as dirty filters, blocked vents, refrigerant …An Air Conditioner Freezing During Summer is Common in Phoenix. Arizona is famous for its hot days, and few people realize that this can lead to an AC unit freezing up in summer. How is that possible? A common cause of a frozen air conditioner in Arizona is a blocked air filter, which restricts the airflow needed to keep condensation …Turn off the air conditioner and disconnect all the electric cables. Open the access door, which will lead to the evaporator. Firstly, check if the evaporating coils are frozen already. If they are, do not use a hammer or your hand to remove the ice because it will affect the coil.Refrigerant leaks are arguably the most common reason that air conditioner evaporator coils freeze over. If the evaporator coils develop a small pinhole leak, the refrigerant will leak out. When the refrigerant escapes this hole, it rapidly loses pressure and falls in temperature, again due to the Joule-Thomson effect.The benefit is obvious with a reversible air conditioner since you can use the air conditioner unit as a heater. But even with a non-reversible air conditioner, you can get a whiff of fresh air in a stuffy room. However, it would be best to be careful when running your air conditioner in extreme cold, as the outdoor unit can freeze over. If your air conditioner is old or constantly freezing up, it may be time to consider upgrading to a new unit. Newer AC systems are designed to be more energy-efficient and less prone to freezing. An experienced HVAC technician can help you choose the right unit for your needs and ensure proper installation. Step 1 - Power Off the Air Conditioning Unit. When your HVAC services professional arrives to check your clogged AC drain line, they will likely turn the system’s power off, even if it is already not running. This is for the safety of the technician as well as to protect the HVAC system from additional condensate …Call 727-592-8479 for AC Service in the Tampa Bay Area. 3. Faulty Fan. Mechanical issues, such as a problem with your air conditioner’s fan, can restrict airflow and cause your air conditioner to freeze up. The fan’s purpose is to help the cold air get to where it needs to go and to transport the warm air outside.Low refrigerant is a common cause of a frozen air conditioner due to the coil pressure. Low refrigerant leads to low pressure, which allows moisture in the air ...1. Turn the AC unit Off. When you notice a buildup of frost on the unit or a restriction of airflow from the vents surrounding your home, power off your air conditioner unit. If you find that the a/c unit is already frozen up, doing so will allow warm air to blow over the evaporator coil, allowing it to thaw out. 2.Your window air conditioner freezing up is likely due to one of three reasons: low refrigerant levels, a dirty evaporator coil, or a blocked air filter. Each of these issues can cause the air conditioner to work less efficiently, which can lead to the unit freezing up. To prevent your air conditioner from freezing up, be sure …Why Your Air Conditioner Unit is Freezing Up. Your air conditioner unit will freeze if the process I have outline above is affected, causing the refrigerant temperature to fall below freezing point. The following are some of the causes of a freezing AC unit: 1. Blocked/Leaking Air Ducts. Your HVAC system has 2 sets of …Apr 25, 2022 ... Clean The Air Conditioner Coils. If dirty coils are causing your air conditioner to freeze, they need to be thoroughly cleaned. There could be a ... Alternatively, you can attach a hose pipe and blast water inside the condensate drain at high pressure. 5. Clean the Coils. Once the unit is nice and dry, you can go in there and wipe down the evaporator coils. Dirty coils are just as bad as wet ones, so you need to take care of that fast. When it comes to beating the summer heat, there is nothing quite like a high-rated air conditioner. With so many options available in the market, it can be overwhelming to choose t...Evaporator coils in your air conditioner cool and dehumidify the air inside your home. When water is removed from the air, it builds up on the evaporator coils.The majority of RV A/C freeze ups are caused by low airflow, usually due to dirty evaporator or condenser coils. The coils in your air conditioner unit—evaporator coils and condenser coils—need to be cleaned regularly. If either set of coils is dirty the air conditioner needs to work harder to cool the air and transfer heat out of the RV.Here are some common culprits behind frozen air conditioner lines: Inadequate Airflow: Insufficient airflow over the evaporator coil is one of the primary causes of air conditioner lines freezing up. This can occur due to closed or blocked vents, dirty air filters, or malfunctioning blower fans.How moisture contributes to the problem. The 3 top reasons why your AC freezes up. - Lack of Proper Airflow. - Dirty Evaporator Coil. - Low Refrigerant Levels. How to prevent an AC system from getting frozen. - Change the air filter. - Clean your evaporator coil. - Get an airflow inspection.Thaw the Unit. If your air conditioner freezes, your first step is to thaw it. Doing so is a simple matter of going to the thermostat and turning off the unit completely. Give the air conditioner a full 24 hours to defrost and then run only the fan for a few hours to dry things out. Some HVAC technicians feel that the AC will thaw more quickly ...Aug 9, 2022 ... Unfortunately, if a blower motor has become damaged or stops working altogether, this can cause the entire unit to freeze up and stop working.Here are some common culprits behind frozen air conditioner lines: Inadequate Airflow: Insufficient airflow over the evaporator coil is one of the primary causes of air conditioner lines freezing up. This can occur due to closed or blocked vents, dirty air filters, or malfunctioning blower fans.Step 1 - Power Off the Air Conditioning Unit. When your HVAC services professional arrives to check your clogged AC drain line, they will likely turn the system’s power off, even if it is already not running. This is for the safety of the technician as well as to protect the HVAC system from additional condensate … Plumbing and heating expert Richard Trethewey shows how to prevent ice buildup from shutting down an air-conditioning system. (See below for steps.)SUBSCRIBE... Feb 29, 2024 · Wear a dust mask and waterproof gloves when removing droppings or other debris in the air return. Do not proceed if you discover black mold. 5. Open Supply Vents. To fix a frozen AC line, it’s ... First, deactivate the thermostat on your air conditioner. After that, switch the fan’s setting from “auto” to “on.”. The system will progressively thaw, thanks to the fan. You can restart your air conditioner and set the fan to auto once the ice has been removed (This may take an hour or more). Humidity can cause an RV air conditioner freeze up because when it cools the air the humidity condenses. So, when the humidity in the air is high, your AC has to work very hard to keep up with the task. Having to cool the air in conditions of very high humidity can overwhelm the AC and lead to the …Learn the causes and solutions for your AC system freezing up, such as poor airflow, low refrigerant pressure, and leaks. Find out how to identify the problem … Alternatively, you can attach a hose pipe and blast water inside the condensate drain at high pressure. 5. Clean the Coils. Once the unit is nice and dry, you can go in there and wipe down the evaporator coils. Dirty coils are just as bad as wet ones, so you need to take care of that fast. Preventing Air Conditioner Freezing. Preventing your air conditioner from freezing is crucial for maintaining its efficiency and prolonging its lifespan. Follow these tips to help prevent air conditioner freezing: Maintain regular air filter cleaning or replacement: Clean or replace your air filters every 1-3 months, …Step two: Find the underlying cause. Check air filters : One of the common causes of blocked airflow in your AC unit is the debris your air filter has caught. As we mentioned earlier, insufficient airflow prevents heat from entering the system and can freeze your unit. If your air filters look dirty, either clean them off or replace the filter ...There is a probe in there that is supposed to sense when the evaporator approaches freezing temps and it then causes the compressor to cycle off. This is why you'll see (and hear and feel) the compressor switching on and off when you're running the a/c. See if your compressor cycles on and off - if it doesn't, suspect the evaporator probe.Specialties: Welcome to Freezing Mechanical, a residential HVAC contractor servicing Miami-Dade and Broward Counties. Freezing Mechanical has more 5-star reviews than any other AC repair and replacement specialist in Southeast Florida (over 500 in fact.). We earn the trust of every customer by employing the best technicians, installing the best brands, …All in all, the best way to avoid what causes an air conditioner to freeze is to schedule annual preventative maintenance. To learn more, or to schedule a repair, please contact Byrd Heating and Air Conditioning. We’ve proudly served Savannah and the surrounding area since 1986. At Byrd Heating & Air Conditioning we care about your …Learn the causes and solutions for your AC system freezing up, such as poor airflow, low refrigerant pressure, and leaks. Find out how to identify the problem …The air conditioner in our travel trailer would shut off and not come back on until it was turned off and reset at the thermostat. The repair was simple, and...Learn why your AC unit is freezing up and how to address the common causes, such as low refrigerant levels, poor airflow, thermostat issues, and …01 - Dirty Air Filter. If the air filter becomes clogged with dirt, it restricts airflow over the evaporator coils. If the airflow is reduced, the evaporator coils get too cold, which then causes the humidity in the room to condense on the coils and freeze. As frost accumulates on the coils, the frost restricts the airflow even more.When air conditioning pipes freeze, it can significantly affect the performance and efficiency of your cooling system. Several factors can contribute to this issue, including: Lack of Airflow. One of the primary reasons for air conditioning pipes freezing is a lack of adequate airflow. When the airflow is restricted or reduced, the evaporator ...Reason #1: Insufficient Air Flow. The first reason why your air conditioner may be freezing up at night is due to dirty air filters. When your air filters get dirty or clogged up, it restricts the airflow through your AC, this may cause the evaporator coil to freeze up. To prevent this from happening, it’s important to change your air filters ...At Blair’s Air Conditioning and Heating, we provide installation, maintenance, and repair services for all of your HVAC needs. We also have a 24/7 emergency line for Pinellas County and South Tampa. When you need reliable repairs, contact Blair’s Air for 24/7 emergency service. Call 727-592-8479 to schedule your …1) Lack of Air Flow means the system is freezing up because it is not receiving the required amount of air (or heat in that air, rather) it needs to keep it from freezing up. 2) Lack of Refrigerant is referring a system freezing up because it is low on Freon, A.K.A "Refrigerant". In order to understand why an AC system freezes, we …Oct 1, 2019 ... 4 Causes of Your Air Conditioner Freezing Up at Night · #1 Air Temperature is too Low. An HVAC unit can be sensitive, requiring multiple factors ...Learn the causes and solutions for your AC system freezing up, such as poor airflow, low refrigerant pressure, and leaks. Find out how to identify the problem …Defrosting your air conditioner is a simple process and may resolve the issue. Be patient and wait to turn it back on until all the ice has thawed. First, turn your air conditioner off at the thermostat. Then, change the fan setting from ‘auto’ to …Your air conditioner may be freezing up outside due to a few reasons such as inadequate airflow, low outdoor temperature, improper refrigerant levels, dirty or blocked air filters and vents, damaged or faulty wiring, a clogged condensate drain line, or mechanical problems. Regular maintenance, ensuring proper airflow, and maintaining …by Joseph Gustaitis 8/19/2000. Willis Carrier in 1915. (Carrier Corp.) It is evening, near freezing, and fog blankets the Pittsburgh railroad station. A young industrial engineer walks the platform, his brain roiling with a problem that has obsessed him for months. He has gone to sleep with it, awakened to it and brooded over it while commuting ...Step 3. Clean the evaporator coil. After the ice is gone, you need to clean the parts of the AC unit from blockages. Carefully wipe the evaporator coil with paper towels. You should also empty the drain pan and check if the air filters need replacement to prevent the freeze on the air conditioner from recurring. Step 4.Garrison air conditioners are produced by Garrison Heating and Cooling Products. The company also produces heat pumps and gas and electric water heaters for home and industrial use...Oct 6, 2023 · Your air conditioner may be freezing up outside due to a few reasons such as inadequate airflow, low outdoor temperature, improper refrigerant levels, dirty or blocked air filters and vents, damaged or faulty wiring, a clogged condensate drain line, or mechanical problems. Regular maintenance, ensuring proper airflow, and maintaining correct ... The watts required to operate an air conditioner can vary based on many factors, including the type of cooling system, the cooling output and the frequency of maintenance.May 8, 2015 · Top 4 Reasons Your Air Conditioner is Freezing: Insufficient airflow across your air conditioner’s evaporator coil. Your air conditioner is low on Freon. You are running your air conditioner when the outside air is below 62 degrees. There is a mechanical failure (kink in refrigerant lines, a blow fan is not running, etc.) It may sound strange that in the heat of summer your air conditioner can actually develop frost but it is possible - and it isn't good.If you’re in the market for a new air conditioner, Trane is a brand that often comes up in conversations about reliability and quality. However, like any major purchase, it’s impor...05 - Rheem Air Conditioner Fan Motor. An air conditioner fan motor is the component that spins the fan blade or blower wheel to circulate the air. If one of the fan motors is burned out, the air won't be circulated properly which can cause the coils to freeze. You can use a multimeter to determine if power is reaching the fan motor.Nonetheless, dirty air filters are the #1 reason why window air conditioners freeze up. Most window AC units use MERV 13 filters. When you are running the AC unit, all kinds of airborne particulates can clog the filters. These include anything from dust, human hair, pet hair, larger smoke particles to mold spores, and even pollen. ...May 3, 2023 ... If the outdoor temperature is below 70 degrees and you turn the thermostat down to 60 degrees, the system may run a long time to bring the ...If your air conditioner keeps freezing up and has left you feeling the heat of the South Florida summer, Sansone can help. We offer emergency AC repairs and can thaw your system and …Kung Fu Maintenance shows four most common causes of air coditioner freezing or icing up repair maintenance video.Get the new albulm "Up Beat" on Itunes http...Your air conditioning unit works through a refined control of airflow, temperature, and pressure. If one or more of these fall out of balance, your refrigerant system that’s responsible for creating the cold air, could freeze up, without cooling the air more. If your air conditioner freezes up, it will either blow cool/warm air or won’t ...2. Low Refrigerant. The second most common reason for your AC freezing up is low refrigerant levels. An AC's ability to maintain a consistent temperature is dependent on the refrigerant. Most refrigerant leaks go unnoticed for long periods and can be found in the refrigerant lines, compressor, or evaporator …05 - Lennox Air Conditioner Fan Motor. An air conditioner fan motor is the component that spins the fan blade or blower wheel to circulate the air. If one of the fan motors is burned out, the air won't be circulated properly which can cause the coils to freeze. You can use a multimeter to determine if power is reaching the fan motor.6. Low Refrigerant Levels Cause AC Coils to Freeze. Low refrigerant is a big problem in itself for air conditioners, but it can cause air conditioner freezing as well. As the refrigerant in your system is relatively low, it must expand more during its transition from liquid to gas.Step 1 - Power Off the Air Conditioning Unit. When your HVAC services professional arrives to check your clogged AC drain line, they will likely turn the system’s power off, even if it is already not running. This is for the safety of the technician as well as to protect the HVAC system from additional condensate …Aug 5, 2008 · There is a probe in there that is supposed to sense when the evaporator approaches freezing temps and it then causes the compressor to cycle off. This is why you'll see (and hear and feel) the compressor switching on and off when you're running the a/c. See if your compressor cycles on and off - if it doesn't, suspect the evaporator probe. Lack of airflow around an HVAC unit can cause it to freeze. This is because the humidity would rise in this area and cause more precipitation to form on the ...If your RV air conditioner is freezing up, it could be because the outside temperature is too cold, the thermostat is set too low, or there’s not enough airflow over the evaporator coils. To prevent your RV air conditioner from freezing up, make sure to keep the thermostat set at least at 60 degrees Fahrenheit and keep the area around the air ...RV AC Freezing Up? Check this first.Links to my Amazon Affiliate Program:Amazon Shop - https://www.amazon.com/shop/aaronrose Even when your filter is clean, you need a fan to work properly to push the air through the system. If the fan isn’t functioning due to a broken motor, the airflow becomes compromised and causes the system to freeze when the cold air lays dormant on the air conditioning coils. Even dirty fan blades will reduce airflow, resulting in the same ... Pressure/Temperature Chart for R-134a refrigerant: http://realpropertyalpha.com/chart/18B/r134a-pt-chart/attachment/r-134a-system-pressure-chart-ac-pro-regar...
May 28, 2022 ... 1.Clogged Air Filter. One symptom that causes a majority of air conditioning issues is a dirty air filter. When your air filter isn't cleaned .... How much to give plasma
Your air conditioner is liable to freeze when refrigerant levels are too low. Even when there is less refrigerant in your system, it must expand the same amount ...Is a frozen air conditioner causing you to lose your cool? Then you know what to do: give Super Heat & Air a call to get it fixed right away! (813) 279-8213. Membership Details. Don’t Lose Your Cool!“Why is my air conditioner freezing up?”. This is one of the most common questions we get here at Super Heat & Air.When air conditioners freeze up, it's almost always caused by insufficient airflow to the evaporator coils or a lack of refrigerant.Jun 26, 2023 · This will move air over the evaporator coils, but without circulating refrigerant to cool the air. If the blower isn't working at all (no air is circulating throughout your house), it's time to call a technician. 3. Check for Issues. As most frozen air conditioner issues stem from the causes outlined above, it's important to check the following: Video about the frost or ice build-up in the Wintertime on a heat pump. Is it normal for your air conditioner/ heat pump to freeze up? We go through differe...6. Address the Freezing Cause. Unfortunately, the air conditioner freezing up is just a symptom of a bigger issue. Even as you learn how to unfreeze an air conditioner, you still need to figure out the cause because, if you do not, it will happen again. More often than not, the obvious culprit is a clogged air filter.05 - Luxaire Air Conditioner Fan Motor. An air conditioner fan motor is the component that spins the fan blade or blower wheel to circulate the air. If one of the fan motors is burned out, the air won't be circulated properly which can cause the coils to freeze. You can use a multimeter to determine if power is reaching the fan motor.Air conditioner freezing up can be caused by various factors related to airflow, restricted refrigerant, and low refrigerant charge. Insufficient airflow due to ...Mar 5, 2022 · To operate correctly, the AC unit depends on the reliable circulation of air to carry off the condensed moisture from the coils. Problems with the flow of air or with the flow of refrigerant through the coils can cause moisture to freeze and ice to form on the coils. Here are seven common reasons why a window air conditioner might freeze up ... 7 Reasons Air Conditioners Stop Cooling. 1. Improperly Set Thermostat. Whether you use a smart thermostat or a basic thermostat, your air conditioner's …Specialties: Welcome to Freezing Mechanical, a residential HVAC contractor servicing Miami-Dade and Broward Counties. Freezing Mechanical has more 5-star reviews than any other AC repair and replacement specialist in Southeast Florida (over 500 in fact.). We earn the trust of every customer by employing the best technicians, installing the best brands, …05 - Luxaire Air Conditioner Fan Motor. An air conditioner fan motor is the component that spins the fan blade or blower wheel to circulate the air. If one of the fan motors is burned out, the air won't be circulated properly which can cause the coils to freeze. You can use a multimeter to determine if power is reaching the fan motor.Jun 26, 2023 · This will move air over the evaporator coils, but without circulating refrigerant to cool the air. If the blower isn't working at all (no air is circulating throughout your house), it's time to call a technician. 3. Check for Issues. As most frozen air conditioner issues stem from the causes outlined above, it's important to check the following: Feb 24, 2023 · Clean the AC unit. After defrosting the ac unit and replacing the filters with a fresh one, it is time to focus your attention on the problematic area. One probable cause of its freezing is the evaporator coils are dirty. Since we talked about how sensitive these coils are and its surrounding components, you might want to use a soft plastic ... An air conditioner fan motor is the component that spins the fan blade or blower wheel to circulate the air. If one of the fan motors is burned out, the air won't be circulated properly which can cause the coils to freeze. You can use a multimeter to determine if power is reaching the fan motor. If power is reaching the motor, but it doesn't ...Learn what causes an air conditioner to freeze, how to fix it, and how to prevent it from happening again. Find out the common causes of frozen AC, such as poor airflow, low refrigerant levels, blocked …Turn the system off and let the ice thaw. You should turn off your air conditioner as soon as possible after you detect a frozen line. This won’t fix the problem, but it will give your air conditioner lines time to thaw out. This can protect your system’s compressor from sustaining serious damage. It can take up to 24 …Jul 31, 2023 · The airflow in your unit may be obstructed, limiting the system's ability to absorb heat. Alternatively, a low refrigerant level can cause the temperature to drop too much, leading to freezing. Other causes may include a dirty air filter, mechanical issues, or faulty thermostats. To fully grasp the reason behind your air conditioner's freezing ... Your window air conditioner freezing up is likely due to one of three reasons: low refrigerant levels, a dirty evaporator coil, or a blocked air filter. Each of these issues can cause the air conditioner to work less efficiently, which can lead to the unit freezing up. To prevent your air conditioner from freezing up, be sure …01 - Dirty Air Filter. If the air filter becomes clogged with dirt, it restricts airflow over the evaporator coils. If the airflow is reduced, the evaporator coils get too cold, which then causes the humidity in the room to condense on the coils and freeze. As frost accumulates on the coils, the frost restricts the airflow even more.Insufficient airflow: Restricted airflow is one of the primary causes of AC unit freezing. When the airflow is limited, the cold air cannot circulate properly, causing the temperature to drop below freezing point. This can be due to a clogged air filter, closed or blocked vents, or issues with the fan motor..