I got my 05 Elise out last night to take my wife to dinner. My wife does not like the car as it is too loud and fast, although she will tolerate it. It was cold out and I never could get the heater to blow warm, so I pulled it back into the garage. I decide to take a look at it this morning. The flap in the heater is working fine, but as the car was idling, I heard the radiator fan turn on. I looked at the temperature and it was 230 (I had never seen it close to that). I turned the car off and looked at the antifreeze reservoir and it was a little low, but not much. I put some antifreeze in and it is doing the same thing. Is the thermostat stuck closed?