All air conditioners can freeze up when not operating correctly.
This includes most any unit from a big home unit to a small window mounted unit.
Here we give the three most common reasons a unit can ice over and stop working.
Reasons Why Your Air Conditioner Can Freeze Up
- Bad Air Flow
- Setting Thermostat Too Low
- Low on Refrigerant
All A/C units need to cycle air or they will not work correctly.
This means pulling air into a unit usually through what is called a Return Air and then blowing the air back into a home usually through vents.
If air becomes blocked at the return air such as a dirty filter, air will stop blowing making a unit not operate as it is designed to do.
Replacing a dirty air filter is a simple DIY job that needs to be done every so often to keep a unit operating correctly.
Blocked vents especially floor vents also can happen and should be cleared so air can blow into a space.
Most system can run and cool down to about 15-20 degrees Celsius, 60-67 degrees Fahrenheit.
Setting a unit colder than it is supposed to be set can make it ice over much like a refrigerator freezer.
Since an air conditioner is not meant to freeze but cool air if set too low they can sometimes freeze up.
Setting a unit to a very low temperature will not cool a space up quicker, and depending on other variables such as outside temperature can at times freeze a unit up.
A unit that is low on Refrigerant can also freeze up.
While adding more Refrigerant is needed most often a leak is in the unit somewhere that will need to be found and sealed.
Finding a leak, sealing it, and adding refrigerant into a unit is best left to professionals.
There is electronic leak detectors that can sniff out a leak, or in some cases soap can be used on a suspected leak to find a bad spot.
All units have a set amount of Refrigerant that can go into a unit before it does not wok correctly which a professional should be called to do.
Refrigerant is sold by the pound and is filled into a unit by the pound ounces also.