My old control unit busted

I have had an old control unit in our apartment for many years.

And for some reason I just never got rid of this thing.

It was one of those plastic control units on the wall with a slider that was plastic. When the old plastic control unit to our central heating plus air conditioning system method finally broke down it was not a pretty thing! It was the dead chilly of the Winter. And I had our heating on. Well, when I went to adjust the control unit on the wall the slider broke off. And then what happened was our control unit was stuck pumping out all of this heating! It was so bad it nearly hot the house. I had to go down to our basement plus pull the fuse on the circuit that ran the central heating plus air conditioning system method unit. That was the only way to get our central heating plus air conditioning system unit to finally shut down! I then opened many windows plus doors in the house, plus this cooled everything down. When I called the local heating plus air conditioning system company, the certified heating plus air conditioning system specialist was kind of shocked that I still had one of these old slider plastic control units. She gave to sell me either a digital control unit plus a programmable smart control unit. I chose to go with a smart programmable control unit. I had heard so much about these things in terms of saving on energy use that I legitimately wanted to try one out!
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