Payne air conditioner runs but does not cool the house adequately; supply air is only slightly cooler than room temperature.

Safety: Do not attempt to open the refrigerant circuit yourself. Refrigerant handling requires EPA certification.

• 1. Check basic airflow: Ensure the air filter is clean and all supply/return vents are open. Poor airflow can mimic low charge symptoms.
• 2. Inspect outdoor unit: Look for oily spots on copper lines or around service valves on the Payne condenser. Oil stains often indicate a refrigerant leak.
• 3. Check for icing: If the suction line or indoor coil is icing, turn the system OFF and set the fan to ON to thaw. Do not continue running a frozen system.
• 4. Measure temperature drop (optional): With a simple thermometer, measure return air temperature and supply air temperature at a nearby vent. A normal system typically shows a 15–20°F (8–11°C) drop. Much less may indicate low charge.
• 5. Call a licensed HVAC technician: A pro must locate and repair the leak, evacuate the system, and recharge with the correct type and amount of refrigerant specified by Payne.