Stay Cool Climate Control in O’Fallon: What are some possible causes of ice freezing up on my air conditioning unit?

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How do I keep my air conditioner from freezing up? This may be a question you keep asking yourself, but to solve that, you need to identify which of the various reasons is causing the problem. Below are top possible causes of an air conditioner freezing up in O’Fallon:  

The air filter is one of the first things you can check as a homeowner. The air filter in your air conditioning unit is responsible for removing dust and other particles from the air before it enters your O’Fallon HVAC unit. Over time, the filter can become clogged with debris, restricting airflow to the evaporator coil. When airflow is restricted, the temperature of the evaporator coil can drop too low, causing ice to form. A dirty air filter can also cause your air conditioner to run less efficiently and potentially lead to damage on the compressor. Changing your air filter as specified by your manufacturer and regularly maintaining your home’s HVAC system is important. Stay Cool Climate Control offers a great Comfort Club Plan to prevent your air conditioner freezing up in O’Fallon and ensure your equipment works as efficiently as possible for as long as possible!  

Another possible scenario that may cause you to think your air conditioning system is freezing up may  be a clogged condensate line. The condensate line is responsible for draining the moisture that is removed from the air by your HVAC unit. If this line becomes kinked or clogged with debris, the  moisture will not be able to drain properly, resulting in water accumulation in the unit. When the  temperature of the unit drops, the accumulated water can freeze, resulting in the formation of ice. In addition to the formation of ice, a blocked condensate line can also cause water damage to your home. Proper maintenance will ensure the drain is clear and flowing. Stay Cool Climate Control also has water switch safety devices to help prevent drain overflow, backup, and water damage- putting a stop to instances of an air conditioner freezing up in O’Fallon.  

One of the more common issues causing your air conditioning system to freeze would be low refrigerant  levels. The refrigerant is the gas that allows your O’Fallon HVAC unit to absorb heat from your home and release it outside, thus cooling the house and removing excess humidity. If there is a leak in the refrigerant line, the level of refrigerant in the system can become too low, leading to a drop in the evaporator coil’s temperature. When the saturation temperature of the evaporator coil drops below freezing, any moisture in the air that passes over the coil will freeze, forming ice. As the ice begins to form, the airflow across the evaporator coil also begins to decrease. In addition to an air conditioner freezing up in O’Fallon, low refrigerant levels can also cause your air conditioner to run less efficiently and potentially lead to damage to the compressor. The refrigerant is similar to the coolant in your car,  ensuring that the mechanical system does not overheat.  

Faulty fan motors and circuit board controls are also causes of poor air conditioner performance and  freezing refrigerant lines. The fan motor in your air conditioning unit is responsible for blowing air across the evaporator coil, allowing it to absorb heat from your home (cooling down the air temperature). If  the fan motor is not working properly, it can cause the air to move too slowly over the coil, leading to the evaporator coil getting too cold and forming ice. In addition to the air conditioner freezing up in O’Fallon, a faulty fan motor can also cause your air conditioner to run less efficiently and potentially lead to damage on the compressor, water damage, and other potential issues. Regular air conditioner maintenance can help mitigate these situations.  

The thermostat is one of the last things I would like to discuss. The thermostat is responsible for regulating the temperature of your air conditioning unit. If your thermostat is not working properly, it can cause the unit to run too long or too much, causing the evaporator coil to get colder than it should and forming ice. A malfunctioning thermostat can also cause your air conditioner to run less efficiently, potentially resulting in higher energy bills.  

I hope this provides a more detailed explanation of the possible causes of ice formation on your air conditioning unit. If you suspect that your air conditioner is experiencing any of these issues, it’s best to have it inspected by a professional O’Fallon HVAC technician for appropriate diagnosis and air conditioner repair in O’Fallon. Stay Cool Climate Control proudly offers 24/7 emergency heating and cooling services in the St. Charles area. We would  love to be your trusted HVAC advisor and help you “Stay Cool” and comfortable!

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