Thank you so much for writing back. I have some more news. I also tried to turn on the Heat and the FAN-Only , but none seems to work either. I also opened up the furnace and looked around and could not find anything resembling a fuse. I have uploaded the pictures of the box containing the transform...

Posting the picture of the control wire that i mentioned in my post above:

Hi..anyone with any questions or suggestions....i was really hoping for some helpful advice!

tks

Hi...I am am not able to get my Thermostat to start the AC. I was using a lawn trimmer to clean up over grown grasses near the AC unit outside the house. before that the AC was working fine. I noticed a thin wire that comes out of my house and goes inside the air conditioner unit outside, is totally...