Dead batteries can cause thermostat problems.
They can also cause you to be embarrassed in front of your HVAC technician.
I learned this the hard way a couple of weeks ago. I thought that there was something really wrong with my HVAC system, but it turned out that there wasn’t anything wrong with it at all. I felt really stupid when I figured out what the problem was. Well, I guess I should not say that I figured out what the problem was because it was actually the HVAC technician who told me what the problem was. I had gone for about a week without a heating system, and the weather is really cooling off around here. I was trying to hold out until I had enough money to pay cash for the heating repair bill. So when I got paid a couple of weeks ago, I made an appointment with my local company to have them come out and check out my furnace. I told them that the furnace was torn up and I had no idea what was wrong with that. When the technician got there, he was able to figure out what the problem was in about two minutes. It turns out that there was actually nothing wrong with my heating system at all. The only problem was the fact that I had not checked the batteries in my thermostat unit and they were dead. I could not believe that that was the only thing that was wrong with my heating system! It was all my own fault, and I felt like the dumbest person alive when the HVAC technician told me that that was what the issue was.