Sebring AC Dead: Common Compressor Engagement Issues

As someone with moderate experience working on cars, I encountered a very similar issue with my 2012 Stratus diesel. The air conditioning system showed identical symptoms, no response when engaging the AC and multiple error codes. After checking with my regular workshop, they identified an undervoltage problem that was preventing the relay switch from properly engaging the AC compressor. The main culprit turned out to be a faulty pressure sensor in the AC system, which was sending incorrect signals to the control unit. The total repair cost came to 240€, which included: Diagnostic checks, Replacement of the pressure sensor, System reset and refrigerant level check Before spending money on repairs, it would be helpful to know: Have you noticed any other electrical issues? Did the problem start suddenly or gradually? Are there any unusual noises when trying to engage the AC? What specific error codes are you seeing? While my case involved the pressure sensor, these symptoms can also indicate issues with the belt tensioner or a refrigerant leak. Without proper diagnosis, its difficult to pinpoint the exact cause, as similar symptoms can have different root causes depending on the specific model and condition.

Thanks for the detailed response. Just had my last service at 16353 KM and found out the issue was indeed related to the pressure sensor, but with an unexpected twist. The HVAC system was actually fine, but corrosion on the sensor connector was preventing proper signal transmission. A simple cleaning of the connections and applying dielectric grease fixed the issue completely. Cost breakdown: Diagnostic fee: 60€, Connector cleaning and treatment: 45€, System pressure test: 35€ Total repair came to 140€, much less than expected. No refrigerant leak found and the relay switch tested perfectly. The belt tensioner was also inspected and showed normal wear for the mileage.

Thanks for the update on your AC repair. Really interesting that we both had pressure sensor issues on our cars, though yours turned out to be a much simpler fix with the corroded connector. My Stratus needed the complete sensor replacement, but its good to know that sometimes its just the connections causing trouble. A pressure test is always smart to rule out a refrigerant leak. The A/C compressor and belt tensioner being in good shape is also positive news. This kind of diagnostic approach helped avoid unnecessary parts replacement. Your repair cost at 140€ was definitely better than my 240€ bill. Makes sense since you only needed cleaning and testing rather than new components. This shows why proper diagnosis is crucial, sometimes the simplest solution is the right one. Did you notice any improvement in how the A/C compressor engages now? My system has been running perfectly since the repair, with much more consistent cooling performance.

Great experience to share! The corrosion issue turned out to be much simpler than expected. After getting the connections cleaned and protected with dielectric grease, the air conditioning system works flawlessly again. The A/C compressor now engages instantly and maintains consistent cooling. Good call mentioning the pressure test, it helped confirm there was no refrigerant leak present. Testing the relay switch and checking the belt tensioner condition were also smart preventive steps that thankfully showed everything else was fine. The total cost of 140€ felt reasonable for the diagnostic work, cleaning service, and system testing. Much better than replacing parts unnecessarily. This definitely reinforces the importance of thorough diagnosis before jumping to component replacement. The key takeaway is that air conditioning problems dont always require expensive fixes. Sometimes its just about maintaining clean electrical connections. The AC has been running perfectly for several weeks now with proper compressor engagement and cooling performance.