My houses’ central air unit has an annoying problem. I’m not sure of the technical terms, but basically the pipes(?) become clogged(?) and freeze. As I speak there is a quarter-inch layer of ice on the pipes.
What can be done to prevent this?
Icing is an indicator of low pressure. I’d suspect you have low refrigerant levels, possibly due to a leak. A competent technician can fix it.
It is time to call a service teck. Sounds like you may be low on charge, which may mean that you have a small leak. And if the leak is not properly fixed major damage can be caused.
Low Freon charge is only one cause of icing, although it is one of the most common.
A dirty coil, a dirty filter, a blower that is not working, a clogged metering device are among other causes.
I ran a call this morning on a unit that 2 inches of ice on the coil/line set.
The cause? A thrown belt on a belt driven motor.
Call a service tech.