Upon inspection system was off on liquid line temp sensor. This is a flash code on the defrost board. Reset the system to test operation. System pressures were 107/280 due to temperature today and humidity this looks to be minorly low on refrigerant charge. Temperature split was 17 degrees but felt little heat removal on liquid line. To cover all bases I recommend replacing liquid line temperature sensor, defrost board and adding proper refrigerant. Customer replaced is going to reach out to installing company first. If any issues he will follow up with us. System was cooling as I left but most likely will shut down at some point.