It's clear that something's not working correctly when an AC unit freezes up. Our HVAC systems are designed to regulate temperature, so the unit itself freezing over is a sign that something needs fixing.
Because of this temperature control function, air conditioning units house components with cooling properties, like refrigerant. There are a few possible causes as to why ice can occur; however, some of them are easy to fix yourself, and others will need a professional's know-how.
