What are common issues with the Vauxhall Insignia cooling system?

I recently purchased a used Vauxhall Insignia and have noticed that the temperature gauge is frequently reading higher than normal. What are some common causes for this and how can I fix it?

One common issue with the Vauxhall Insignia is a faulty thermostat, which can cause the temperature gauge to read higher than normal. This can easily be fixed by replacing the thermostat.

Another possible cause for the high temperature reading could be a leak in the cooling system. Check for any visible leaks and have them repaired as soon as possible to avoid any further damage.

It's also important to make sure that the radiator is functioning properly. If it is clogged or damaged, it can lead to overheating issues. A professional inspection can help determine if the radiator needs to be replaced.