Crock pot question

[Crow Hunter]

I own two crock pots, one older than the other. When I use both at the same time, for a sauce or whatever, when I am ready to 

turn them off after a certain number of hours, it is obvious that one is running substantially hotter than the other, with both set on low. Is there a ballpark temperature

that a crock pot should run close to when set on low? On high? I should stick a temp probe in each next time and see what the actual difference is.

[rundrave]

I have 2 newer crockpots that I feel cook too warm even on low temp for longer cooks like roasts etc . One of my new ones even has the temp probe etc. I have never been able to cook a a good roast out it.