I recently registered on your guys forum, so I am new here.
Wanted to ask you something. I am experiencing constant problems with the cooling system of my 2012 Impreza. First I noticed that it's not cooling down enough according to the temp gauge. I thought that the problem's about thermostat. But a less than 6 months ago I had the thermostat replaced, and then it did not open at all. Now it seems like it opens, but due to some reason the system won't cool down enough and keeps higher than normal temperatures.
Apart of bad thermostat, what may cause this? Maybe coolant went bad or something?
Any ideas are appreciated!