Why does my Air Conditioner Freeze Up?

Answer

The most common reasons an air conditioner will freeze up are due to either a dirty filter preventing proper air flow, or the unit is low on refrigerant.
1 Additional Answer
The most common reason why an air conditioner freezes up is because of insufficient air flow which could be caused by a dirty filter. Another reason for your air conditioner to freeze up is that the refrigerant may be low and may need charging. Sometimes when the outside ambient temperature is below 60 degrees F the air conditioning system will not operate properly and freezing up may occur.
Q&A Related to "Why does my Air Conditioner Freeze Up?"
Air handlers on an air conditioner will freeze if there are low levels of refrigerant (freon) in the system, which can be caused by a slow (or not so slow) leak. A dirty air filter
http://answers.ask.com/Business/Other/what_causes_...
The main cause of the air conditioner air handler freezing up is low refrigerant (freon) in the system, which is sometimes caused by a slow leak in the system. Refrigerant levels
http://answers.ask.com/Business/Other/why_does_air...
The most common reasons an air conditioner will freeze up are due to either a dirty filter preventing proper air flow, or the unit is low on refrigerant.
http://answers.ask.com/Business/Other/why_does_my_...
In most cases, a slow leak in the system causes the air conditioner air handler to freeze up due to low refrigerant (freon) levels in the system. Refrigerant levels should be checked
http://answers.ask.com/Business/Other/why_do_air_c...
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