Audi A5 AC Dead: Common Causes and Cost Guide

My 2010 Audi A4 2.0 TFSI had nearly identical AC temperature control issues. After thorough diagnostics, the problem was traced to faulty expansion valves in the AC system. The valves had deteriorated over time, preventing proper refrigerant flow regulation. The AC maintenance revealed multiple issues: the expansion valves were completely stuck, and this had caused additional strain on other components. What initially seemed like a simple refrigerant leak turned out to be more complex. The system showed no response when activated because the valves prevented proper pressure buildup. This was indeed a serious repair requiring specialized knowledge. The entire process involved: Complete system evacuation, Valve replacement, System pressure testing, Refrigerant recharge, Electronic control verification Worth noting that ignoring valve issues can lead to compressor failure, which would be significantly more severe. The inability to turn on the system and complete lack of cold air are typical symptoms of valve failure, matching exactly what youre experiencing. Recommend finding a shop specializing in Audi AC systems, as proper diagnosis requires specific knowledge of these systems.

Thanks for sharing these details about the valve issues. My AC problems turned out very similar, no cold air and complete system failure on my A5. After getting it fixed, the AC efficiency returned to normal and Ive had zero issues for over a year now. Did you track how much the total repair cost was? Im curious if prices have changed since I had mine done. Also wondering if youve noticed any other AC problems develop since the valve replacement? Would be helpful to know if this tends to be a one-time fix or if other AC components typically need attention afterward.

Having the AC diagnostics completed and repairs done made a huge difference on my A4. The cooling system is working perfectly since getting those faulty valves replaced. The total repair came to 1000 Euro, covering the complete valve replacement and necessary system testing. The pressure switch and temperature control have remained stable with no additional issues in the past 14 months. Based on what the technician explained, once the valves are properly replaced and the system is correctly recharged, you typically dont face recurring problems. The key was having a thorough repair done by specialists who understood the specific AC system design. This seems to be a one-time fix as long as regular maintenance is followed. The AC efficiency is actually better than it was before the problems started. No other components have needed attention since the repair was completed, which suggests addressing the valve issue early prevented damage to other parts of the system.

Agreed, those valve issues can be tricky. I finally took mine to a certified Audi specialist after putting it off for weeks. The AC relay was checked first but turned out fine. Their AC diagnostics revealed failing expansion valves, just like you described. The repair cost me 1200 Euro total, which included a full cooling system inspection and refrigerant recharge. The pressure switch and other components checked out fine, fortunately. They completed everything in one day and the AC efficiency is now better than ever. Been about 6 months since the fix and no issues at all. The specialist walked me through the whole process and showed me the old valves, they were completely shot. Getting it done by experts was worth every cent compared to my previous bad experience at a general repair shop. Really glad I didnt wait longer, as they mentioned the compressor could have been damaged if I kept running it with bad valves. The cold air now blasts like new and the temperature control works perfectly. Definitely learned my lesson about using qualified techs for AC work.