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The main reason A/C lines freeze is due to reduced airflow. A blower motor failure could easily cause this, as could clogged air filters or an obstruction in the air handler path. On some systems, if several rooms have closed vents, the change in cooling load may be enough to cause the evaporator to freeze.
An alternative answer would be a failure in the expansion valve. This would not be easy for the typical homeowner to detect and generally requires the removal of refrigerant in order to repair. On some systems the expansion valve has a temperature sensing bulb which is attached to the return line (out to the compressor). If this bulb has become detached, it will no longer sense the correct temperature and could also be a cause of the freezeup.
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What happens when central air conditioner freeze?
my copper lines freezing on central air unit.
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Freeze-12 is compatible with R-12 as well as with 134a refrigerants. It may be hard to find, though, because it has been discontinued.?æ
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can a faluty thermostat affect your central ac working?
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Lines BE and AC are?
letters of the alphabet
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Cold water lines may have more insulation than hot water lines, otherwise they should both freeze unless there is some agent in the water.
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yes
