A:Answer When you set the temperature on a mechanical thermostat, the heater it controls will power on until the temperature reaches the set point, then the heater will turn off. The heater will turn back on again when the room temperature drops below the set temperature and the cycle repeats. Because mechanical thermostats are accurate to within 2 and 5 degrees, depending on the model, that translates to temperature swings of a few degrees.
In contrast, electronic thermostats have digital sensors that are much more accurate and responsive. The temperature swings with electronic thermostats are much smaller. Many are within 1 degree of the temperature you set on the thermostat.
