Without Climate Control

Warm air comes out of the vents. The suction line is cool to warm, and the discharge line is warm to hot

Probable cause: A/C system is low on refrigerant, indicating a possible leak

Do the refrigerant leak check A/C Refrigerant Leak Check, and repair any leaks. Recharge the system to specifications A/C System Charging

Also check for

HVAC DTCs How to Troubleshoot the Heating and A/C Systems (Without Climate Control)

Also check for

Add refrigerant oil depending on the part you replaced Service and Repair