T-Cross Engine Overheating Linked to Faulty Electric Fan

I had a similar issue with my 2017 T-Roc last summer. Having some experience with engine cooling systems, I initially thought it might be more serious, but it turned out to be fairly straightforward. The symptoms were nearly identical, rapid temperature increase and inconsistent cooling fan operation. After taking it to my regular workshop, they diagnosed a faulty wiring connection to the cooling fan control module. The electric motor itself was fine, but the connection was causing intermittent operation of the cooling system. The repair involved replacing the damaged wiring harness and connector. Total cost was 95€ including parts and labor. Since the fix, the temperature control has been working perfectly with no further overheating issues. Before jumping to conclusions about your T-Cross, it would help to know: Does the overheating happen more during idle or while driving? Have you noticed any coolant leaks? When was the last time the coolant was changed? Are there any warning lights on the dashboard? These details would help determine if your issue is similar to what I experienced or if it might be something else in the cooling system.

Thanks for sharing your experience. My last service was just 2 weeks ago at 129273km, and they did a full coolant flush then. The overheating mostly happens at idle, and the electric fan seems to kick in out of nowhere. No warning lights or coolant leaks visible. The radiator fan sometimes runs at full speed even when the engine is barely warm, while other times it stays off despite high temperatures. I will have them check the wiring connections and control module based on your experience. The electric motor itself sounds normal when running, so hopefully its just a wiring issue like in your case. Your repair cost of 95€ seems reasonable compared to replacing the entire cooling fan assembly. Would you recommend any specific tests for the temperature control system to confirm if its just the wiring before they start replacing parts?

Thanks for those additional details. Given the similarities to my case, especially the unusual fan behavior, I am even more convinced we had the same wiring issue. When my T-Roc showed these symptoms, the fan motor would also run erratically, sometimes at full blast with a cold engine, other times not engaging when needed. The workshop can perform a simple electrical continuity test on the fan clutch wiring and control module connections. This test revealed the intermittent connection problem in my case without needing to replace the entire electric motor assembly. A key indicator that points to wiring rather than a bad fan motor is that your fan still functions, just not at the right times. In my repair, they also checked the temperature sensors since faulty readings can cause similar vehicle overheating symptoms. One suggestion, have them inspect the control module connector for corrosion or loose pins while testing. The diagnostic time added about 35€ to my total repair cost but saved money by pinpointing the exact issue rather than unnecessarily replacing the whole engine cooling assembly. Since your coolant was recently serviced, and there are no leaks or warning lights, focusing on the electrical components of the cooling system makes the most sense as the next step.

Thanks for the detailed suggestion about the diagnostic tests. My mechanic has scheduled the car in for next week, and I will specifically ask them to check the wiring and control module connections first. The continuity test sounds like a smart starting point before replacing any major parts. The behavior you described with your T-Roc matches mine exactly, especially how the radiator fan runs at odd times regardless of engine temperature. Hearing that your repair was straightforward and relatively affordable gives me hope this wont be too costly to fix. Will make sure they thoroughly inspect the control module connector and temperature sensors during the diagnostic process. An extra 35€ for proper testing seems worth it to avoid unnecessarily replacing the entire electric fan assembly. Good to know the coolant service likely isnt related to the overheating issues. I will update once they complete the electrical system checks and determine if its the same wiring problem you experienced with your engine cooling system.