When you are in the heat of the summer, the last thing you want is an AC system that isn’t working the way it should. If you have turned on your AC system and find that you are getting only warm air coming out of the vents, you could be dealing with a frozen evaporator coil situation. Before you are able to get cool air out of the vents again, you are going to have to give your system time to thaw. Air Supply Heating & Air Conditioning is here to talk about some of the troubleshooting that can be done when you have frozen coils to hopefully help you get to the bottom of the reason you have the problem in the first place.
Turn Off Power to Air Conditioner
The first thing that you should do to thaw out your evaporator coils is to turn off the AC system all together. If it is left on, there will continually be refrigerant that is pumped through the coils, and it won’t allow the system to thaw out for you. Once you have turned off the AC system, turn the blower on to help speed up the process. If you have caught it early, this process may not take too long. If the ice is thick, it could take all day for the system to thaw out. Check your condensate pan throughout the process to make sure the water is draining properly so that you don’t have any water damage issues from the excess water dripping from the coils.
Troubleshooting Why My Evaporator Coil is Freezing Up
The most common problem that causes an air conditioning system to freeze up has to do with airflow. There are several reasons that your AC system may not be getting the airflow that it needs to function properly. Following are the most common issues that you should check first when dealing with frozen evaporator coils.
– Clogged Air Filter: You should be replacing your filter on a regular basis to ensure your system is getting the airflow that it needs to operate. Dust, dirt and other debris could be the cause of your frozen coils.
– Closed Supply Vents: There are registers throughout your home that should always be opened. Shutting these vents will decrease the airflow to your system.
– Covered Return Vents: These vents don’t have a lever that opens or closes them, but it isn’t uncommon to have furniture, rugs and other items in your home covering them.
– Low Refrigerant: While airflow is usually the most common issue that is likely causing frozen coils, you could be low on refrigerant as well. This means that you have a leak somewhere and need the help of an HVAC professional to help you get the problem resolved.