I had a battery operated thermostat and I changed the batteries every year
Did you suppose that it is recommended to change the batteries in the smoke alarm every year? I must disclose that I don’t change those batteries frequently, instead I change them when the alarms start to chirp indicating that the batteries are low.
That is with any unit or even our car, I change the batteries when I suppose they are low or after they have died.
There was 1 incident where the batteries on our thermostat died and at first, I thought I was having a drastic issue with our central air unit. I was renting a apartment and didn’t suppose that the thermostat used batteries. It was an older Heating, Ventilation, and A/C unit, and the thermostat was digital, however I could tell it was dated as well. At first, I noticed that the air had become irregular, but when I turned off the thermostat and turned it back on, the returned to normal. This happened for a couple of mornings, and that is when I thought there was a major issue with the Heating, Ventilation, and A/C unit. I almost called our landlord to let him suppose that I needed an Heating, Ventilation, and A/C specialist, but after some investigation, I noticed that the numbers on the digital screen of the thermostat were fading. It was at that moment that I realized that our thermostat used batteries. I figured out how to remove the thermostat from the wall, and I opened the back panel and upgraded the batteries. After that incident, I changed the batteries in the thermostat once per year to guarantee that our Heating, Ventilation, and A/C unit functioned officially and to also avoid spending currency on unnecessary service calls. Perhaps I should do the same and change the batteries on our smoke detector yearly as they recommended us to do.