Aircon 50 www.aftermarketonline.net JUNE 2026 Leak free aircon starts with the hose Nissens is introducing replacement AC hoses into its product portfolio, which it says provides a premium-quality solution to the need for reliable, high-performance, and long-lasting replacements that fulfil the functional demands of the AC system. One of the most important aspects of AC service is to check the condition of the entire sealed loop, not just around the joints to the system’s major components like the compressor, condenser and heat exchangers, but also along the length of the hoses, whether they are sections of solid tube or flexible hose. Telltale signs of potential AC hose problems/refrigerant leaks include oily, dust-attracting areas because the oil remains on the surface and dust/dirt sticks to it, so soiling on the hose, joints, or surface is a clear sign of a leak problem. In addition, the flexible rubber-based sections can become porous, causing the gradual escape of the refrigerant. Older and higher mileage cars should therefore undergo particularly careful inspection in these areas. Finally, mechanical damage, even if only light in nature, or vibrations, can both expose the hose to risk or the loosening of joints and subsequent refrigerant loss. Cracks, dents, and perforations cannot be repaired. If a potential leak is detected, a proper leak test procedure must be undertaken, including a long-term leak test using a nitrogen-based solution and leak sensor support. This best practice principle is important because the refrigerant and lubricant, which are necessary for the AC system’s efficient operation, need to be in the correct ratio, and leaks in the system can easily affect it. In addition, these leaks can potentially cause contamination from moisture or foreign particles. Should a failing joint, crack or split become apparent, the AC hose will need to be replaced, which also provides the opportunity to flush out the old mixture and replenish it with new oil and refrigerant, something that should also be part of a standard AC service operation. However, this will also require the appropriate pulled vacuum process to remove moisture and facilitate the final charge. As can be appreciated, therefore, AC hoses are vital, and their relevance remains constant, irrespective of the vehicle’s powertrain, because they are used equally in the heat pump systems associated with electric vehicles, as they are in traditional combustion engine systems. With an initial range covering approximately 25-30% of the European passenger and light commercial vehicle parc, the new Nissens AC hose range is fully compatible with vehicle layouts and modern refrigerants. It is thoroughly tested to ensure a leak tight, efficient, and long, trouble-free service life, and combined with the company’s first-fit inclusive parts policy, ticks all the boxes for the independent workshop. Nissens’ AC hoses comply with, or exceed, the SAE J3062 and J2064 standards and feature a double-wall barrier construction (5-layer design) that combines EPDM, PA (nylon), and PET layers for superior refrigerant retention, vibration resistance, and corrosion protection. They are helium-tested and 100% inspected to ensure leak-free performance and precise bend alignment for seamless integration into tight layouts, and they are suitable for extreme operating conditions ranging from -40°C to +135°C. Pre-mounted O-rings, gaskets, and fixed brackets are included, reducing installation time and eliminating the need to source additional required parts. Orifice tubes, filters and mufflers are also included when applicable. Finally, they are compatible with R134a and R1234yf refrigerants to ensure future-proof repairs, and their safe, recyclable packaging protects against dirt and moisture during storage and transportation, with a sustainable, single-material design. www.nissens.com/ac-hose
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