Warm Air From Vents. Suction Line Cool-Warm, Discharge Line Warm-Hot, No Frost On Exp Valve (With Climate Control)

Warm air comes out of the vents. The suction line is cool to warm, the discharge line is warm to hot, and there is no frost on the expansion valve

Diagnostic Procedure:

1. Probable cause: Excessive air and/or moisture in the system, indicating a possible leak

2. Do the refrigerant leak check A/C Refrigerant Leak Test and repair any leaks. Replace the receiver/dryer, Service and Repair then recharge the system to specifications A/C System Charging

Also check for:

- HVAC DTCs How to Troubleshoot the Climate Control System
- Check the amount of refrigerant oil in the system. Adjust the oil level as needed.