Homeowner stated indoor coiling coil continuously kept freezing up. Had multiple companies out and all said system was okay. Checked airflow and found very high static pressure on the return side and little to none airflow across the cooling coil. This will cause the coil to freeze up due to a lack of airflow. Also found the blower wheel dirty, an eighth of an inch of dirt on a blower wheel can reduce airspeed up to 20% lastly found the return duct work extremely dirty, this will block airflow cause complications. Homeowner will be following up with a co application for financing for the entire estimate.