VW Taigo Climate Control Failure: Sensor Issue Alert

I had a similar issue with my 2020 VW T-Cross, which shares many climate control components with the Taigo. As someone with moderate DIY car repair experience, I initially tried basic troubleshooting but ultimately needed professional help. The symptoms were identical, the climate control system stopped responding, and the temperature sensor readings were inconsistent. After taking it to my regular workshop, they discovered the problem wasnt actually the temperature sensor itself, but rather a damaged cable connection to the climate regulation module. The repair involved accessing the connection behind the dashboard, where they found and replaced a faulty wiring harness that connects the temperature control unit to the main climate control module. The total cost was 95€, which included diagnostic time and parts. The fix completely resolved the issue, and the automatic temperature control has worked perfectly since then. These climate control problems are often connection-related rather than sensor failures. Before suggesting specific solutions for your case, could you share: Have you noticed any other electrical issues in your car? Does the manual fan control still work? When did the problem first appear, suddenly or gradually? Did you get any specific error codes from the system? This information would help determine if youre dealing with the same underlying issue I experienced.

Last service was just 2 weeks ago at 27500km and everything appeared fine then. After reading about your wiring harness experience, I checked my manual fan controls, they still work perfectly. The problem appeared quite suddenly last week during a cold morning. The error code shows P0073 which apparently relates to sensor circuit issues. The temperature reading seems completely off now, showing -5 degrees when its clearly much warmer inside the car. This makes me think the HVAC sensor might be the culprit rather than the wiring, but Im not entirely sure since the rest of the climate regulation system still responds manually. No other electrical problems noticed so far. Do you think I should still check the wiring connections first before replacing the temperature sensor?

Thanks for those details, especially about the P0073 code and the -5 degree reading. Your case actually sounds different from what I experienced, despite the similar symptoms. While my issue was purely connection-related, your stuck temperature reading at -5 is a classic sign of a faulty HVAC sensor. The manual controls working properly actually helps confirm this diagnosis, it suggests the climate regulation system itself is functioning, but its getting incorrect input from the temperature sensor. This matches the P0073 error code perfectly. In my follow-up experience with my T-Cross, I later encountered a similar sensor issue, but the readings were fluctuating rather than stuck at -5. The temperature sensor replacement cost me 120€ and took about an hour at the workshop. Since then, the climate control system has worked flawlessly. Given your specific symptoms, I would recommend going straight for the sensor replacement rather than investigating the wiring. The consistent -5 reading strongly indicates a failed sensor rather than a connection problem. The fact that it happened suddenly after a cold morning also fits the pattern of sensor failure. What happened in your vehicle matches a known pattern with these temperature sensors, they can suddenly fail after exposure to extreme temperature changes, even in relatively new vehicles with low mileage.

Based on all this feedback, I will probably book an appointment focusing on sensor replacement rather than wiring inspection. The -5 temperature reading issue and P0073 code seem to point clearly towards a faulty sensor, not a wiring problem. Since my manual controls still work and the problem started suddenly during that cold morning, it makes sense that the temperature sensor diagnostics should be the first step. The estimated 120€ cost for sensor replacement seems reasonable, especially if it can be done within an hour. I just hope the climate control system will be fully restored once the new sensor is installed, as the current situation with no automatic temperature control is quite inconvenient. Will schedule the repair next week and make sure to mention both the error code and the specific -5 degree reading issue to help them target the sensor replacement efficiently. Thanks for helping me understand the likely cause before taking it to the workshop.