glad to see i'm not the only one with this problem that can't seem to figure out the cause. I live in northwest arkansas and it has been in the upper 90's since i got my vx home a few weeks ago. on the interstate it's fine but in stop and go traffic it creeps up not quite to the h mark but close. did a scan a few weeks back and it was at about 226. replaced the clutch fan with a dual speed electric fan and replaced the theromstat. still does it. but if i kick the heater on it drops back down in just a few minutes. or if i start traveling about 40mph or more. guess i just need to fix my windows to roll up and down correctly and learn to deal with the heater on during summer traffic.