Dealing with inconsistencies between your thermostat setting and the actual temperature in your home can be both frustrating and confusing. Whether it is the peak of summer or the coldest winter evening, the last thing you want is an unreliable thermostat. From placement and calibration to HVAC system performance, several factors can cause these issues. Here are the most common reasons your thermostat may not be reaching the right temperature and what you can do about it.