After that, your AC should be back to normal working order. Air conditioners are full of moving parts that can get stuck, broken, or clogged. Refrigerant lines can kink, fans can stop moving, filters can become clogged, and things can leak. Any of these things causes a drop in pressure, allowing the refrigerant to expand too much and become too cold. Refrigerant is also an essential part in ensuring a regulated temperature throughout your machine.
A too-low level of refrigerant is also known to cause freezing up. Some of these problems are easier and cheaper to fix than others.
In the case of a coolant leak, any fix is likely to just be a temporary fix. It may be time to consider investing in a new machine. Mechanical problems and leak repairs go a bit beyond a short guide to AC freezing. If you suspect mechanical failure or leaks might be the cause of a malfunctioning AC, contact an HVAC company and have a professional come give the problem a look. Air conditioners are calibrated to operate within a certain set of optimum temperature thresholds.
When nights in the summer time are colder than the optimum threshold can account for, it can throw an AC out of whack. The single most common reason why your AC can freeze up is lack of airflow. This can be caused by a number of different malfunctions ranging from the blower motor to the air intake.
If anything in the airflow system stops warm air from flowing over the coils while the compressor continues running, your AC will start to freeze up and this only gets worse with time. Your ducts are how air moves through the house so if something blocks the duct, naturally air stops flowing correctly and this can block airflow to the coils. Even if the rest of the system is running smoothly, a collapsed or blocked air duct in your home or more than one duct can cause your AC to lose airflow.
The blower motor, naturally, matters a great deal in this system. And once that air stops blowing, the coils start freezing. You may hear irregular or rattling sounds from your AC if your blower motor is in the process of failing. Sometimes, the culprit is home electricity. ACs require electricity to a variety of high-power components to run which is why air conditioning becomes a central part of your summer power bill. Your AC air filter is not something that should be casually neglected, though it is all too easy to forget.
That filter sits between your dusty home vent and the AC itself, keeping the air and your compressor coils clean. But when it fills up with dust, like any filter, it becomes a clog instead of a pathway.
Go to your electrical breaker and turn off the power to your AC unit. This will keep the system from freezing up even more and begin to let the ice thaw. The AC compressor is the most expensive component in your air conditioning unit. The strain could damage this incredibly valuable part and set you up for a costly air conditioning repair service call. Once the ice is completely melted away, you need to dry the evaporator coils.
You can use some paper towels, or let the parts dry out in the sun if in direct sunlight. Restore the power to your system and turn the blower on. Run inside and set your thermostat to only run the blower or fan, depending on the model of the thermostat you have. This circulates air around and through the coils to dry them quickly. Once the coils are dried thoroughly, your system should resume operating normally. Take these measures to keep your HVAC system from freezing over.
The leading cause of a frozen HVAC system is a dirty air filter. The air filter cleans the air circulated into your home. As your AC system runs throughout the summer, the filter catches dirt, pollen, dust, and other allergens. This can restrict airflow and could lead the HVAC coils to freeze. Typically, we recommend you check your filter monthly. This is one of the leading culprits of an AC freezing up.
After the initial coat of frost accumulates on the coils, it can eventually build up to a thick sheet of ice. Think you can simply add more refrigerant? This leak could be found in the refrigerant lines, compressor, or evaporator coil.
Airflow is essential in an air conditioning system. However, there are a number of airflow problems that can occur. Check out the most common airflow complications you could be experiencing:. The blower motor and fan help to blow air over the coils in the system, which helps to create cool air.
This can cause a frozen AC unit. If this is the problem, you may hear rattling sounds coming from your air conditioner. As air conditioners use tons of energy, sometimes a few system components can get left behind. For instance, your fan or blower motor might not be receiving the power it needs. Your AC air ducts are vital for a properly working system.
However, they can experience problems at any time. From leaks to blockages, these air duct problems can result in very poor airflow. If you notice your AC freezing up, including weak airflow coming from your vents, schedule a duct inspection appointment with a professional. A dirty or clogged air filter is another common reason why you have your AC freezing up. Even if you have a properly functioning air conditioning system, weak airflow through your filters could lead to a very uncomfortable home.
While ice is something you never want to see in your system, dust is another one to add to the list. Typically caused by dirty air filters, dust can easily accumulate on your AC refrigerant coils. As these coils are usually wet from the surrounding moisture, dust can stick to them with ease. As moisture continues to accumulate, thick sheets of ice can form. If you have your AC freezing up, it can be a frustrating problem. Luckily, some simple troubleshooting tips can help, which include:.
Since airflow is a leading reason for an air conditioner freezing up, making sure to change your air filters regularly is highly encouraged. Try writing a reminder on your calendar or posting a note on your fridge.
Unfortunately, forgetting this simple task is very easy. Furthermore, it can also enhance the performance of your system.
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