T-Cross Climate Control Issues Link to Faulty Sensor

I had nearly identical issues with my 2020 T-Roc last winter. As someone with basic maintenance experience, these humidity sensor and climate control problems can be really frustrating. The symptoms started similarly, first noticed the dashboard warning for the climate system, then electrical issues with various components. The windshield fogging became a major problem because the system couldn't properly detect humidity levels. Took it to my regular workshop where they diagnosed a faulty wiring connection to the climate control module. The main issue was a damaged plug connection that affected multiple systems. Total repair cost was 95€ and they fixed it in about 2 hours. The key was identifying that all these seemingly separate problems were actually connected to one central electrical issue. The repair resolved all symptoms, AC, washer nozzles, and mirror heating all working perfectly since then. Could you share some additional details about your T-Cross: Engine type and size, When did the first warning appear, Does the visibility get worse in specific weather conditions, Current mileage This would help determine if your issue matches what I experienced and could suggest the most relevant solution path.

Had my last service just 2 weeks ago at 79569km and they didn't catch this malfunction. Appreciate the detailed response about the wiring connection issue, that sounds promising since my symptoms match yours exactly. The humidity sensor errors started showing right after some heavy rain, which might not be coincidental. The AC and climate control problems have definitely gotten worse this past week. Good to know it might be a relatively quick fix with reasonable costs. Will have it checked focusing specifically on those electrical connections you mentioned. The visibility issues happen mostly during temperature changes, and when humidity levels fluctuate, which aligns with what you described about the car sensor systems being interconnected.

Thanks for the additional details about the timing and conditions. Since your symptoms started after heavy rain, this strengthens my suspicion about the wiring connection being the culprit, exactly like what happened with my T-Cross. The fact that your issues are worsening during temperature changes is a classic sign of compromised automotive sensor connections. My climate control system showed similar behavior before the repair, especially when humidity levels changed rapidly. After my repair, I learned these car sensor systems are quite sensitive to moisture intrusion. Water likely seeped into the connection points during that heavy rain, causing the cascade of dashboard warning messages and system malfunctions. Given your mileage and service history, focusing on the electrical connections near the climate control module makes the most sense. The repair should be similarly straightforward, in my case, they also applied a protective coating to prevent future moisture-related issues. One tip: document when the visibility problems occur and under what specific weather conditions. This information will help the technicians pinpoint the exact location of the failing connection more quickly.

Truly appreciate this follow-up about the moisture intrusion potentially causing the sensor issues. Your repair experience gives me a clear direction for my service visit. The connection between the heavy rain and my car sensor problems starting makes perfect sense now. The dashboard warnings have actually increased since my last post, now showing up almost daily. Ive been tracking the conditions like you suggested, and noticed the climate control acts up most when transitioning from cold outdoor temps to warm garages. The visibility issues are definitely worst during these temperature changes. Will get it checked next week, focusing on those electrical connections and requesting they check for moisture damage near the climate control module. The 95€ repair cost you mentioned seems reasonable, especially considering how many systems are affected. Good call about asking for protective coating too, definitely want to prevent this happening again after the sensor calibration and repairs are done. Will update the forum once its fixed to help others who might face similar automotive sensor problems in the future.