The answer to 'how long does thermostat last' is that most thermostats have an average lifespan of 5-10 years, depending on usage and environmental factors. Thermostats are an important component of your HVAC system, controlling the temperature and cycling of your heating and cooling equipment. Over time, the internal components can wear out or become less accurate, leading to the need for replacement.
Factors that can affect a thermostat's lifespan include the quality of the thermostat, how often it's used, temperature extremes, and exposure to dust or moisture. Higher-quality, programmable thermostats tend to last longer than basic manual models. Proper installation and regular maintenance can also extend the life of your thermostat. If you notice your thermostat is not functioning properly or the temperature readings seem inaccurate, it may be time to consider replacing it.