RB,
Peddler of bullshit & misleading information. Read Mattax's post #54. It explains in terms so simple that even you should be able to understand how a stat works: the rated temp is the OPENING temp, not the fully open temp.
It is obvious from your post #52 that you actually have NO IDEA how the cooling system works.
As for your 'findings' about a 160 stat opening in hot water, there are three possibilities:
- temp measuring device is faulty
- stat is faulty
- you need better glasses