Rohith

Hi everyone, I have an Audi A3 2010 1.6 TDI, and I'm dealing with a really frustrating overheating issue. The engine temperature behaves oddly: At 3000–4000 RPM, the engine stays around 90–100°C (which seems normal). But at 1000–2900 RPM, the temperature shoots up to 130–150°C. This is really difficult to manage, especially in city traffic where you can’t keep the revs that high. On top of that, fuel consumption is way up. So far, I've taken it to a garage and they’ve done the following: 1. Replaced the water pump – no change. 2. Replaced the thermostat – no change. 3.Replaced the entire radiator/condenser – still no improvement. After all this, the mechanic now says there might be a blockage somewhere or an issue with a cluster, but he’s asking for more money to look into it further. I’ve already spent a lot, and I’m not confident they know what they’re doing anymore. Has anyone faced something similar? What could be the issue here? I’m at a loss and don’t want to keep throwing money at guesses. Any advice would be really appreciated!