It depends. Systems have time delays, anticipators, and smarter t-stats(electronic boards aka mini-computers) that tell the contacts when to open. This can be much worse on a mercury stat. If your stat reads 75,and you have it set to 75,it might take a short time for it to shut down.This isn't a problem.
If everything was always done "by the book"....the book would never change.
Have you tried checking the temperature with something other than your thermostat?
Bama suggested the t-stat may not be calibrated properly. That's a real possibility. I had the same thing recently with a digital Robertshaw t-stat. There were instructions included with the stat that allowed me to reset the temp.
It is in cooling mode. Don't know about a fan off delay.
Well the problem with my A/C as you may be able to tell from other threads is that it barely works. The A/C runs for hours (during the day)just to bring it down one degree. So when it finally comes down to the set temperature I'd like it to shut off. But it will keep running. Eventually it will shut off at the set temp. But not as fast as it should. If it comes to the set temp it may not shut off for like an hour after that. It doesn't go lower than the set temp.
So freeze, what your saying is not to answer any questions, give advise or help anyone who post here, might as well close the site then.
Most here make their living "fixing ac's" too but enjoy helping others all the same,
If you don't want to answer any post that's fine, I don't think us answering this post will take business away from you.
Enjoy the site, good techs in this forum, you never know some one here might have to answer one of your questions or you may need advise unless you have mastered the ac field, I know I haven't mastered it yet, hopefully in the next 30 years I will have mastered it.
Again, enjoy your stay here.