Running Hot

[theslawdawg]

Hello all,

Here's my situation: I previously had a two core radiator that I switched out with a nice three core radiator. Prior to this switch, my temp level was fine. I made the switch only because I am moving to a way hotter climate and just planning ahead. Now, my temp level is much higher. It is not necessarily overheating, just well past the line I'm normally used to (so it is running hotter). Any thoughts?

Also, If it is the thermostat, and the thermostat is bad, wouldn't you know it pretty quick or is it a very slow gradual process?