One of the most common problems that people have when it comes to their air conditioners are frozen coils. There are a number of possible reasons why an air conditioner freezes.
Below are some of the most common causes of a frozen air conditioner and how you can fix them.
#1: Not Enough Airflow
One of the reasons why an air conditioner freezes is that you don’t have enough air that is flowing over the evaporator coils. This air that’s flowing over the coils loses the heat to those coils, but that doesn’t happen if you don’t have sufficient airflow. This means your refrigerant becomes too cold which could mean the coils freeze.
The refrigerant that’s returning to your outdoor compressor also will be extremely cold, and this could mean that your compressor’s at risk of becoming damaged. The compressor is extremely expensive to replace. It’s important that your returning refrigerant’s warm so it’s losing the heat to outside.
You’ll be able to tell if the indoor coils have been frozen when you open up the compartment to your air handler and looking.
How to Solve It
In order to fix this issue, you may just have to replace the air filter since air filters that are clogged restrict the airflow that’s necessary for the evaporator coils. It’s a good idea to check or change the air filter once a month. Wait for the ice to melt from the coils before you turn the AC back on and you’ll see if the solution’s fixed your problem.
#2: Evaporator Coils That are Dirty
Another reason that your evaporator coils have frozen is because they are dirty. This is essential since your coils have to be clean so that they are able to efficiently operate. If there’s a lot of buildup and gunk on your coils, they won’t have the ability to absorb heat so that your home’s properly cooled.
Ensure that the HVAC technician’s cleaning the evaporator coils when you are having annual maintenance done on your air conditioner. A lot of homeowners make the assumption that it’s being done, but it’s also a good idea to check. This is going to ensure that the coils don’t have any mold, gunk and dirt during the year.
Evaporator coils that are dirty also can cause debris and clogs inside the drain line. After this line’s clogged completely, you may end up having water damage accumulating around your inside air conditioning unit.
How to Fix It
It’s possible you’ll have to replace the air filter and clean the evaporator coils. This is something that should be left to a professional HVAC unless you are familiar with doing it yourself.
#3: Insufficient or Blocked Return Ducts
When your HVAC system was installed, if it was done properly, there should be ample return and supply ducts for your building. But if your registers and vents are blocked, it can cause a problem.
Even though it may seem like a good way that you can save money when you close off the vents in the rooms you don’t use, this can actually cause a lot of problems for you and can freeze up your air conditioning.
How to Fix It
Do a walk through of your house and ensure that there aren’t any return or supply registers and vents in the home that are blocked. Sometimes this happens by mistake and have things like clothes, furniture, drapes, and some other items in front of them.
#4: The Motor Malfunctions
Another common cause that the airflow is inadequate and the coils freeze is a malfunctioning or broken blower motor. This is your AC systems part that blows its return air on your AC unit’s evaporator coils. The coil becomes too cold so that they will freeze up.
How to Fix It
Get in contact with your local HVAC company so that they can diagnose it and fix it.
#5: Your Refrigerant is Low
If the airflow is insufficient, it’s possible that you can fix the frozen AC unit yourself. But if the refrigerant is low, chances are that its due to a leak in your system. So that you are able to remedy your leak as well as recharge your refrigerant, a call to your local HVAC professional is needed.
How to Fix It
Call your local HVAC company. Ensure that the professional will fix your leak and recharge your refrigerant.
When you let your AC unit to run even though it has frozen coils, it’s very irresponsible. The reasons that your AC unit becomes frozen are preventable. Some are easy and others will need you to hire someone who is a professional HVAC technician. But no matter what the reason it has happened you should make sure that you take care of it quickly.
When you are having problems with your air conditioner and you don’t know what the problem is, it could be a frozen coil. Look through these possible causes above and then use the tips listed to have it fixed. But it’s a good idea to make sure that you are fixing it as soon as possible. If not, you might end up finding that you have to replace your whole unit.