A sure sign is to check the supply registers. Is it warm? Open the panel and check for ice. However, seeing ice is pretty-well a guarantee that your AC is frozen. First, we must understand that temperature is how much energy a molecule has. The same works in reverse, cold air is comprised of low energy molecules.
When it is compressed, the molecules get excited and heat up. The point of an air conditioner is to expand the refrigerant inside the evaporator coil so that it cools down, so when it leaves the air conditioner, it cools the air inside your home and effectively removes the hot air from inside the house. However, if something in the air conditioner malfunctions, the whole system gets disrupted. This causes the evaporator coil to allow the refrigerant to cool too much, causing it to fall below freezing and ice over.
So, how can you prevent something in the cooling equation from going terribly wrong? There are three main causes that lead to an AC freeze up. By understanding these causes, you can get out in front of them so you never have to experience an AC freeze. Keeping your air conditioner in great shape will help it run more efficiently, saving you money on your energy bill, and keep it from becoming an eye sore.
This restricts the air flow in your house. Keeping your AC clean and tuned up is also a good idea for preventing air flow problems, and other problems in general.
Your AC is already blocked, and you discovered that your air filters were clogged. While your air conditioner is thawing, be sure to watch the water levels in the unit. If the drain pan inside the evaporator coil overflows, you can experience water damage in your air conditioner.
Sometimes AC freeze ups can be because of the refrigerant chlorodifluoromethane , also known as R R22 refrigerant has different physical properties at various levels of pressure.
In a properly functioning system, the way the refrigerant is passed through the lines it is at a temperature where condensation may form on the outside of the line. If something happens and the pressure in your system changes, the pressure change can cause the R22 to act differently.
As the moist, warm air from your house moves over the evaporator, the moisture will condense and freeze on the coils and ice will begin to form! You might not notice a change in the performance of your system with minor frost, but too much ice will affect the airflow. Eventually, the ice will act as an insulator and prevent the air conditioning system from functioning properly, and the R22 refrigerant will evaporate faster.
If your system does not cool anymore, your AC potentially has water damage. We recommend having an HVAC professional inspect your home as soon as possible to repair it. Check and replace your air filters first. Even if your air filters are clean, poor airflow could still be the problem. The reasons why the inside of your AC can become a frozen-up icebox relate to either airflow, pressure, or both. The more moisture there is in the air, the more ice builds up.
It covers the inside of the AC like an old chest freezer and crawls up the copper pipes. We get the majority of our frozen AC calls during Monsoon season when homeowners begin to see ice crawling up the copper piping all the way to the outdoor compressor.
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.
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