Leak Tests

WARNING: GOOD VENTILATION IS NECESSARY IN THE AREA WHERE A/C LEAK TESTING IS TO BE PERFORMED. IF THE SURROUNDING AIR IS CONTAMINATED WITH REFRIGERANT GAS, THE LEAK DETECTOR WILL INDICATE THIS GAS ALL THE TIME. ODORS FROM OTHER CHEMICALS SUCH AS ANTIFREEZE, DIESEL FUEL, DISC BRAKE CLEANER, OR OTHER CLEANING SOLVENTS CAN CAUSE THE SAME PROBLEM. A FAN, EVEN IN A WELL-VENTILATED AREA, IS VERY HELPFUL IN REMOVING SMALL TRACES OF CONTAMINATION FROM THE AIR THAT MIGHT AFFECT THE LEAK DETECTOR.

1. Attach Rotunda R-134a Manifold Gauge Set 176-R032A or equivalent to the service gauge port valves as indicated in the instruction manual provided in the A/C service kit.
2. Leave both manifold gauge set valves closed. Both gauges should indicate approximately 413-551 kPa (60-80 psi) at 24°C (75°F) with the engine off.
3. If very little or no pressure is indicated, charge the refrigerant system. Evacuation and Charging
4. Leak test the refrigerant system using Rotunda R-134a Automatic Calibration Halogen Leak Detector 023-R1003 or equivalent.
5. If a leak is found in the refrigerant system, recover the refrigerant and service the system.






Rotunda R-134a Automatic Calibration Halogen Leak Detector 023-R1003

The electronic leak detector will automatically calibrate itself when switched to the ON position. Move the leak detector probe slowly, approximately 25 mm (1 inch) per second, past the suspected area. When escaping refrigerant gas is detected, a ticking or beeping signal will be heard. As the amount of refrigerant gas detected increases, the rate of the ticking or beeping increases. If the refrigerant gas is relatively concentrated, the signal will become increasingly shrill. Follow the instructions included with the leak detector for proper handling and operating techniques.