what would make a airconditioning unit ice up?
Answers:
In my experience its caused by low refrigerant level. Try recharging it. Cleaning the coils could help somewhat, but if its freezing solid it probably more than just dirt.. its working way too hard.
Other answers:
Really high humidity and a dirty filter
Really high humidity and a dirty filter
HI,,, not enough freon in the ac will do it... .also,, clean the filter.... it will help.....
Not the proper Ventilation, make sure it has plenty room to breathe all around it.
Dirty filter or evaporator coils or low on freon.
Running it too long and too cold
Low on coolant.