Subaru Impreza AC Dead: Quick Diagnostic Guide

Had a very similar AC issue with my 2011 Subaru Legacy diesel last summer. The symptoms match exactly, no response from AC button and no cold air flow. After AC diagnostics, it turned out the AC relay had failed, which is why the system showed no response. The mechanic also found a refrigerant leak at one of the valves during pressure testing. This combination of problems is fairly common in these models. The blower motor was still working fine, but the pressure switch had shut down the system to prevent damage. This is actually a critical safety feature when refrigerant levels drop too low. This was a serious repair that required: Replacing the faulty AC relay, Fixing the leaking valve, Recharging the system with fresh refrigerant, Testing all pressure points Initial simple checks you can do: listen for clicking sound from relay when pressing AC button, Check if fuses are intact, Look for obvious signs of refrigerant leaks (oily residue around connections) A proper AC diagnostic test is essential here to pinpoint the exact issue and prevent further system damage. These symptoms typically indicate more than just a low refrigerant situation.

Thanks for that detailed feedback. My situation seems nearly identical, especially the part about the pressure switch and relay issues. My mechanic just completed the repair last week, and the AC is working perfectly now. The temperature control is spot on again. Did you remember roughly how much you paid for the full AC maintenance service? Also curious if youve had any other AC-related problems since the repair? Im hoping this fix will last me through the summer at least.

Got good news to share, since that major AC repair I mentioned, my Legacy's AC system has worked flawlessly. The temperature control remains precise and the AC efficiency is exactly what you'd expect from a properly functioning system. The total cost for my AC maintenance service was around 1000€, which covered fixing the defective valves in the air conditioning system. While it wasnt cheap, the investment was worth it considering the reliable performance since then. Its been over a year now with zero AC-related issues. The blower motor runs smoothly, and the AC relay functions perfectly, no more problems with the system failing to engage. Just make sure to run the AC regularly, even in cooler weather, to keep all components properly lubricated and working well. Based on my experience, once these valve issues are properly addressed and the system is thoroughly checked, you should be good for many summers to come.

Thanks for the feedback. I recently got my AC fixed and wanted to share my experience. Took it to a local shop that specializes in AC repairs. They found exactly what was mentioned, a failed AC relay and a small refrigerant leak near one of the connections. The entire repair cost me 850€ which included replacing the relay, sealing the leak, and a complete system recharge. The temperature control is working perfectly now and the cooling system feels even better than before. The mechanic was upfront about the diagnosis and showed me the faulty parts. Much better experience than my previous repairs. They also provided a 12-month warranty on the work, which gives me peace of mind. Really glad I asked here first, helped me understand what to expect and made me feel more confident when discussing the repairs with the mechanic. The AC efficiency is back to normal and Im ready for summer.