HVACR Leaders Magazine: Meet the New President of ASHRAE, Bjarne W. Olesen

While the last two cannot be prevented since
components have a limited service life, there is
something that can be done to prevent the first
two from forming frost in the refrigerant lines.
The simplest, most cost-effective way to ensure
the refrigerant lines do not freeze is to change
the air filters regularly, usually about every
three months or so. Once the evaporator coils
are seen to be dirty, it needs to be cleaned
by a professional to ensure that all the dust is
vacuumed out, allowing smooth air flow.
only when the outside temperature does not go
below 62 degrees Fahrenheit.
Such is a technique which is common sense.
But it is worth mentioning that below the
mentioned temperature, the pressures inside
the air conditioner could drop, which can cause
a freeze up. Plus it would not only prevent
the HVACR system from freezing, it saves the
owner energy and money on utility costs by just
opening the windows.
It is also recommended that the owners should
not close supply vents, or the ones that blow air
out, even in unused rooms as doing this reduces
airflow over the evaporator coil.
When it comes to the HVAC refrigerant charge,
it takes a technician to test the air conditioning
system for potential problems like leaks,
weakened parts, and insufficient coolant. The
owner does not have to worry about the icing
in the refrigerant lines if the testing is done
regularly.
Moreover, frost in refrigerant lines can be
prevented if the air conditioning system is run