Concluding, (Its been a long time since I replied) First, On the AC; the used car dealer where we just recently purchased it agreed to have there service dept check it out. The system held a vacume fine. Charged it and the AC works like it should. When you turn the AC on now the low speed fan is on. This van has the rear AC also. Will keep an eye on it.
Second, on the temp sensor; What I hear is that the 220 deg range of the sensor operating is so high that the engine rarely gets that hot. If you compare the temp gauge with a clock it has to get to about 2 for the sensor to operate. Mine was as high as about 1 so I thought that was a problem. I guess its all in what you know and learn.
Thanks all for your input. It really helped troubleshoot and I appreciate that. Ya never know, maybe someday I can return the favor.