Why Air Conditioning Systems Freeze and How to Fix Them, 2020-01-20

Let’s start with the basics. Water freezes at 32° F at sea level and atmospheric pressure. When any surface is below that temperature, and the air around it contains moisture, ice/frost will begin to form. In some situations, ice is to be expected, such as in refrigeration evaporators and exposed portions of the refrigeration suction line and the metering device outlet in refrigeration applications. Frost and freezing are also likely in heat pumps operating in heat mode.
Some systems we work on and install will freeze. Air conditioning is not one of them.

McConnell Pushes to Speed Impeachment Trial as Trump Requests

Why is my air conditioner freezing up? - HVAC Tips and Tricks

Troubleshooting Tips for AC Freezing Up Issues and Prevention

The Davos Plutocrats Warm Up to Trump - The New York Times

Why is my AC freezing up? 7 Reasons and Troubleshooting Tips

Air Conditioner Keeps Running When Turned Off?

What to Do When Your AC Unit Freezes Up

The 2020 China report of the Lancet Countdown on health and

Human SOX17 Antibody AF1924: R&D Systems

Why is my air conditioner freezing up? - HVAC Tips and Tricks

Energies, Free Full-Text

How to Repair a Frozen Air Conditioner

What To Do When Your AC Unit Freezes Up - Townsend Energy