Looking for Solutions: 2012 Dacia Sandero Overheating Issue and Possible Coolant Thermostat Problem

Hey there, I had a similar issue with my 2010 Dacia Logan not so long ago. I'm not an expert, but I have some experience with cars and the usual quick fixes. My local workshop diagnosed it as a damage to the wiring harness. The heat melted some wiring together and messed up the signal to the thermostat. They sorted it out for me and it cost roughly 110 Euro. It's pretty perfect now, no overheating or check engine light. Could you tell me about your average driving conditions? Like do you do a lot of city driving or is it more of a highway kind of use? Want to make sure if you're facing similar issues. Cheers!

Hi there, appreciate your quick reply. I'd say my Sandero sees more city traffic than the open road. The mileage is at 69687 KM and the last time it had a full service was around 5000 kms ago. I'm definitely no car whiz myself, but I'm hoping it's not something gravely serious like a melting wiring harness! Based on what you said, I think I'll swing by the local workshop to have it checked out. Fingers crossed it doesn't burn too big a hole in my pocket. Thanks for the help!

Hey again, yeah, city driving can be hard on cars for sure. Given the circumstances, it still could very well be your coolant thermostat, so don't stress too much just yet. When I had the wiring harness issue with my Logan, it was due to extreme heat from long summer road trips on highways. Your Sandero's mileage suggests she's been around the block a few times, but also that she's not precisely overused. Since you've had it serviced not too long ago, it might even be something as simple as needing a little coolant top-up. Or perhaps a sensor is acting up and triggering that check engine light. Either way, getting it checked out at your local workshop sounds like the best plan. Remember, it's not necessarily something super expensive repair. Fingers crossed, it's just a minor blip. Let us know what the at the workshop say! Good luck!

Hey, you've really helped alleviate some stress, thanks for that! A coolant top-up or sensor on the fritz does sound more manageable, and I'm banking on that being the case now. Will definitely let you know what the workshop says once I've had it looked at. Thanks again for sharing your experience and advice, really appreciate it. Take care!