Thanks for the answers, as to which one I don't know. The place I had it checked told me it was a heat sensor and when I asked where it was, they told me it was by the thermostat. But for a non-mechanic like me, that don't tell me nothing. All I know is oil, water, etc. are full and the light and the fan still come on.
I really appreciate the help from the forum. Rich <_<