Either the indoor coil (I assume that is what's freezing up) is getting too little airflow (bad fan, dirty air filter, clogged coil, etc.) or the unit is low on freon.
You can sanitize your car air vents by removing the cover and vacuuming up dust that may have settled there. You can also try leaving the air running for a while to get rid of the odor.
It's possible.
Freeze.
my copper lines freezing on central air unit.
no you would probibly freeze.
there is no edvience that the air conditioners will freeze up with perlong use when it comes to reoccurring use. However if you never turn off the air conditoners you will worn down the parts in which you have to replace more quickly.
freeze
Float up.
no cold air makes you you feel up your energy when your skin starts to freeze.
First determine the symptoms the air conditioner is having. For example, does it have power, is the fan running but no cold air, is the cold air not cold enough? Then you can look up possible causes on the web in sites like http://www.repairclinic.com/Air-Conditioner-Troubleshooting?red=Air-Conditioner-Repair-Help
Assuming they were protected from other hazards such as asphyxiation, a person would freeze to death on Mars.
A person would freeze on Mars. The warmest parts of Mars are about the same temperature as the coldest parts of Earth.