Car Aircon Oil Checker R134A Auto Air Conditioning System Oil Tester Refrigeration Oil Testing Instrument

1. The R-134a Refrigerant Oil Test Swab is a disposable diagnostic tool designed to check the oil level and quality in automotive air conditioning systems. Made of plastic and cotton, it provides quick visual results for R134a refrigerant-based systems.2. How to Use:Step 1: Start the engine and set the AC to maximum cooling.Step 2: Ensure the compressor is running.Step 3: After 2-3 minutes, press the swab’s nozzle against the low-pressure valve port rapidly 2-3 times.Step 4: Interpret results and take action as needed.3. Oil Level Diagnosis–Less than 20% Oil: Severe deficiency – Add 70–100g refrigerant oil based on vehicle specifications.–About 50% Oil: Mild deficiency – Add 30–40g refrigerant oil.–About 70% Oil: Adequate – No action required.4. Oil Quality Diagnosis:–Normal: White to pale yellow.–Early Degradation: Yellow/orange – Add compatible oil.–Severe Degradation: Red/brown – Replace refrigerant and oil entirely.5. Compatibility: R134a systems only.6. Note: Does not work on systems with fluorescent dye additives.