Suzuki Landy AC System Failure: HVAC Sensor Issues

I had a similar issue with my 2012 Suzuki Swift. With some experience working on cars, I recognized the symptoms right away as they matched what you described. The temperature sensor issues started just like yours, the auto climate control stopped responding and the AC became unresponsive. After running sensor diagnostics at my regular workshop, they discovered the problem was actually quite simple, a loose connection between the HVAC sensor and its wiring harness. The repair involved checking all the temperature control connections and replacing a damaged plug connector. Total cost was 95€ including labor and parts. The whole job took about an hour, and the climate control system has worked perfectly since then. Before suggesting specific fixes, could you share: Have you noticed any warning lights on the dash? Does the blower motor run at all? Are you getting any specific error codes from your scanner? This information would help determine if your Landy has the same sensor issues I experienced or if something else might be causing the temperature control problems.

Thank you for sharing your experience. My Landy just had its latest service 2 months ago at 9015KM. The scanner shows error codes P0532 and P0533 which point to AC pressure sensor circuit issues. No warning lights on the dash, and the blower motor runs fine but only blows ambient temperature air. Based on your experience with sensor issues, I wonder if checking the wiring connections first would make sense before committing to a full temperature sensor replacement. The HVAC sensor diagnostics seem similar to what you encountered, though the error codes are different. Would you happen to know if accessing the temperature control wiring harness is straightforward on these models? Just trying to gauge if this is something worth attempting to diagnose myself before taking it to a workshop.

Thanks for those additional details. Actually, your error codes P0532 and P0533 point to a different issue than what I encountered with my sensor problem. These codes specifically relate to the AC pressure sensor circuit, while my temperature control issue was related to the interior sensor wiring. Unlike my loose connection fix, your climate issues appear more complex since they involve the AC pressure monitoring system. While I was able to get away with a simple wiring fix, your situation likely requires professional attention since AC systems are pressurized. The wiring harness access on these models is reasonably straightforward, its located behind the glove box area. However, given the pressure sensor involvement, I would strongly suggest having a workshop handle this repair. When my sensor diagnostics revealed just a loose connection, it was a simple fix. But dealing with AC pressure components requires specialized equipment for proper climate control system testing. Based on my repair experience, you could be looking at costs between 150€-300€ depending on whether the pressure sensor needs replacement or if its just a wiring issue. This estimate assumes similar rates to what I encountered with my repairs. Have you noticed any changes in AC performance before it stopped working completely? This could help determine if the pressure sensor failed suddenly or gradually.

Thanks for sharing those insights. Your case does sound quite different from mine, especially with those specific error codes. I definitely understand now why you mentioned the pressure sensor connection, that makes a lot of sense. I actually noticed the AC performance gradually declining over about a week before it completely stopped. It started blowing less cold air, then became inconsistent, and finally just stopped altogether. Looking back, this probably was a good indicator that the pressure sensor was starting to fail rather than just having a loose connection like in your case. Given what youve shared about the specialized nature of AC pressure systems, I think Ill skip trying to diagnose this myself and book it into a workshop. The price range you mentioned (150€-300€) seems reasonable for this type of repair, and its probably worth paying for proper temperature control system diagnostics rather than risk making things worse. Ill get it booked in next week and hopefully its just the sensor or wiring rather than a bigger AC system problem. Thanks again for sharing your experience, it really helped clarify what Im dealing with here.