“Why does my air conditioner freeze?” is a common question.
It’s hard to believe your air conditioner can freeze in 90° weather. It does happen though and fixing it may be easier than you think.
So, why does your air conditioner freeze?
Your air conditioner can freeze for a few different reasons.
Insufficient air flow across the evaporator coil.
If your coil is not getting enough air flow, it is not transferring the heat properly from your home to the refrigerant in your air conditioning system. This will cause the refrigerant temperature to continually drop and eventually freeze.
To fix this, start by checking your air filter. Make sure it is not clogged and blocking your air flow. Checking your air filter is the equivalent to restarting your computer when you are having computer problems. 9 times out of 10, it is the first thing you should do.
If your air filter is clean and your system is still freezing, check your vents. Make sure your vents are not blocked. If your return vent is covered, your cooling system might not be able to draw enough air in.
Your cooling system is designed to have a specific amount of refrigerant. If the refrigerant level gets too low it throws off the pressure of the system and can cause freezing. If airflow is not the problem, you will need a professional to check your refrigerant levels and recharge your system, if needed.
An air conditioner is a complicated system with a lot of moving parts. If you have good air flow and the proper amount of refrigerant and your air conditioner is still freezing, you probably have a mechanical failure someplace in your system.
This could be a kink in the refrigerant line, a broken blower motor, or various other mechanical problems. It is best to call in a professional to troubleshoot and repair your system.
There are a lot of things that can go wrong with your cooling system. Make sure you check what you can before you call someone.
You don’t want to sit in your home sweating while you wait for the service technician to come if all you had to do was change the filter.
On that same note, you don’t want to go beyond your capabilities either. Don’t start taking your air conditioner apart if you don’t know what you are doing. You may cause more damage or get injured just trying to save a couple bucks.