There are a couple of things that cause your AC to freeze up.
If your indoor coil is icing up you:
1. Have a dirty filter
2. Have a system low on refrigerant
3. You have a blower that is not providing enough air across the coil
4. You have set the thermostat too low (below 70 degrees Fahrenheit, setting the AC lower does NOT cool the room down faster)
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∙ 12y agomy copper lines freezing on central air unit.
the unit stopped working completely - did it freeze up?
Yes if it does not have a low ambient kit on it
Because you are low on freon.
No, it's not your fault. It's just running too much. Often this can happen due to the level of refrigerant in the air conditioner being too low, perhaps due to a small leak. The air conditioner should be checked out by a reliable cooling repair person.
it could be the heater is leaking!
When you are running your air conditioner and it stops then the air conditioner is froze up. You have to cut it off for a while, and let it warm up. You have to turn the thermometer between 70-75 to keep it from freezing up.
Central of course because it is larger.
Because a fan only stirs up the hot air while an air conditioner removes humidity as well as cools the air.
How to recharge my air conditioner and have not been able to find a cap. Where do I hook up the coolant to refill the air con?
It is sufficiently cold outside (where the outdoor unit sits) that the coolant returned to the indoor unit is freezing condensed moisture from inside. The ice will build up and probably freeze the condensation pump an you may end up with a little flood on your hands.
Your air conditioner compressor may be seized up. If it is seized up the belt would lock up every time you turn on the air conditioner, causing the car to die.