AC freezes up

Ice forms on the evaporator coil, suction line, or both.

Cooling

normal

Diagnosed here

Air Conditioner Not Cooling
Troubleshooting
A measurement led approach to poor cooling, starting with airflow rather than the gauges.

Background

Superheat and Subcooling
Concept
The two measurements that tell you how a refrigerant circuit is really being fed and drained.
Air Filtration
Concept
Filter ratings, the trade off between filtration and airflow, and how filters actually fail.
Airflow Fundamentals
Concept
CFM, static pressure and why airflow problems are behind a large share of service calls.

Local Code Notice

HVAC installation, venting, combustion air, ventilation air, gas piping, clearances, termination locations, electrical requirements, permits, and equipment requirements vary by jurisdiction and equipment. Always verify the applicable local codes, adopted code edition, regulations, permits, and manufacturer installation instructions before installation or service.