I live in a aprtment complex and the managemnt takes forever to fix my ac isuues.
My air works find when it comes on. I had a old thermasta and replace it with a digital one.
I can not get the air to come on when set to a normal tempeture 68 degree. The bit is only 1 1/2 years old. What could be wrong?

Did it work before you had the new unit in to set the temp.