Add me to this list. I was running with the windows down & the heater BLASTING on the way back to Phoenix from California last night. A/C works great most of the time, but it becomes impotent when the temp gauge is pegging. By the time I got back & parked it, I could hear BOILING coming from the overflow tank--it was about 2 hours after dark & the A/C hadn't been on for at least an hour. I had topped off the coolant overflow tank before I left.

It gets WAY worse in town & with stop/go than on the highway. I tried babying it back here as much as I could--I hope I didn't do any damage to it. I'm not even sure where/how to proceed. I plan to flush it & pressure-wash the radiator (remove any caked-on dirt that might be obstructing airflow). Beyond that though, I'm at a loss.

Did we ever get a resolution on this? I'd rather get this nailed down in Phoenix--where there's more shops/people deal with cars overheating more often--than wait to get to SLC & have to work with a smaller market & less options.