VW Taigo HVAC System Failure: Controls Dead, No AC

Had a similar issue with a 2018 T-Roc 1.5 TSI. The climate control panel stopped responding and the HVAC system showed similar symptoms. After diagnostic testing, it turned out the wiring harness connecting the control module had deteriorated, causing intermittent power supply issues to the entire climate control unit. The main problem was found in the electrical connectors behind the center console. Moisture had gotten into the main connector block, causing corrosion on several pins. This affected both the temperature sensor readings and the control panel function. The repair required: Removing the center console, Replacing the main wiring harness for the HVAC system, Installing new electrical connectors, Recalibrating the climate control module This was a significant repair that took about 4 hours of labor. The issue is relatively common in VAG vehicles of this generation. Would suggest having them specifically check the wiring harness and connector block before replacing any major components. Make sure they perform a full diagnostic scan, as error codes can point to specific connector or power supply issues rather than component failure.

Thanks for sharing your experience with the T-Roc. My Taigo had very similar electronic faults. This really helps narrow down what to look for with my HVAC system troubles. The wiring harness issue makes a lot of sense given the symptoms. Could you remember what the total repair cost was in your case? Also curious if you had any other climate control problems pop up since the fix? Would help me budget and know what to watch for after repairs.

The repair cost was significantly lower than expected, just 95€ to fix the faulty electrical connectors behind the climate control panel. Much better than the potential expense of replacing major air conditioning components. Since having the wiring issue fixed, the HVAC system has worked flawlessly. The electronic faults cleared up completely once the connection was properly restored. The temperature sensor now reads correctly and all climate control functions respond as they should. Looking back, it was definitely worth getting a proper diagnostic check rather than jumping to replace expensive parts. The real problem was just a degraded cable connection affecting the whole system. No other climate control issues have surfaced in the past 8 months since the repair. For your Taigo, having them thoroughly check those electrical connections first could save you money compared to replacing larger components unnecessarily.

The mechanic visit went much better this time around. Took your advice about the wiring harness check and showed them your feedback on similar VAG models. The diagnostic revealed corroded connectors affecting the climate control panel, just like you mentioned. Total repair came to 120€ including labor. The HVAC system is now working perfectly, heat, AC, and temperature sensor all functioning normally. No more error codes showing up on the dash. Really glad I asked here first instead of letting them replace expensive parts unnecessarily. The whole repair only took about 2 hours. Mechanic even showed me the corroded electrical connectors they replaced behind the control panel. Definitely keeping an eye on the system for any future issues, but everything feels solid now. Thanks again for helping me avoid a potentially costly misdiagnosis. The power supply to all climate components is properly restored and working as intended.