How To Unfreeze Air Conditioner Lines. Thawing ice from an air conditioner. My a/c guy also told me that running the a/c when it's cooler outside than inside can cause it to freeze up in certain conditions like low airflow or low freon.
Reasons of air conditioner freezes up. Thaw out your air conditioner The first step in repairing your air conditioning unit and preventing freezing is to inspect the cold air line for any tears or damage to the insulation.
The only solution for this issue is to not run the air conditioner when the outside temperature is too low.
If you notice that your air conditioner is not cooling well, and you take a look at the indoor unit and see ice or frost on the coils, the first thing you must do immediately is turn the unit off. Pay extra close attention to the connection at the venting system and near any bends in the line. If your air conditioner is already not working you can simply look for an ice build up on the line. What to do when your ac unit is freezing up.