how to check for a refrigerant leak in my Volvo XC90

Solution

1. Preparation

• Gather necessary tools and materials: UV dye, refrigerant leak detector, manifold gauge set, safety goggles, and gloves.
• Ensure the vehicle is parked in a well-ventilated area.

2. Visual Inspection

• With the engine off, visually inspect hoses, connections, and the compressor for any signs of oil residue or damage.
• Look for any physical cracks or signs of wear on rubber hoses.

3. Add UV Dye

• Tools Required: UV dye, syringe or refrigerant canister.
• Follow the manufacturer’s instructions to inject the UV dye into the low-pressure service port.
• Run the AC system for about 10-15 minutes to allow the dye to circulate.

4. Leak Detection

• Tools Required: UV flashlight.
• Turn off the AC and use the UV flashlight to inspect all AC components.
• Look for glowing spots indicating the presence of dye, which signifies a leak.

5. Use Refrigerant Leak Detector

• Tools Required: Refrigerant leak detector.
• Power on the leak detector and scan around the AC components, including hoses and the evaporator.
• Note any areas where the detector alerts, indicating a refrigerant leak.

6. Pressure Test

• Tools Required: Manifold gauge set.
• Connect the gauge set to the service ports and check the pressure readings against the manufacturer's specifications.
• If pressure is low, it may confirm a refrigerant leak.