Ok so im starting to notice something here. So when driving down road, temp stays at its reading or it goes down. When at a stop light or idleing, temp would start to go up slowly but it goes up. Once i start moving, it starts dropping.
So is this a fan issue? Fan is working . I see fan turn on at 192 degrees. Also it turns on when AC is on. Im just not able to tell if it turns on on full speed or what. Hard to tell and listen when car exhaust is so loud. How to test fan?
Totally different vehicle but on my 13 Silverado I had a similar issue. Basically, when driving around there were no temp issues. But if I stopped at a red light or let the truck idle for an extended period of time, the temperature would begin to creep up to about 3/4 on the temp gauge until the (secondary) fan kicked on and brought the temp back to normal. If I started moving it would immediately go back down to normal.
GM trucks use an electric fan system I think it's two fans, a main and and auxiliary. As it turns out, the computer readings have to reach a specific temperature, [[[don't remember what it was, but someone on the Silverado forums did tell me the number, I feel like it was well over 200F but don't quote that]]] which is pretty hot before the aux fan kicks on, meaning the temp gauge can rise up quite high before the computer deems it hot enough to turn the extra fan on. This had a lot to do with the ambient temperature outside -- I only had these problems in the spring, when it was hot enough to warrant both fans, but
just not quite hot enough to need both of them when the vehicle first started idling. In the summer I never have that issue, because it's always so hot both fans are constantly working.
I know it's a whole different vehicle manufacturer, and a completely different cooling system design .. but the symptomatic problem is exactly the same from what I've experienced.. so maybe this bit of information can help you perhaps.
Also, like gdm said, you may just be trying to flush the system but the water boils faster than antifreeze. Perhaps once you refill with antifreeze the issue will resolve itself?