The Smoke and Heat Sensor triggers an alarm by the presence of a significant number of particles in the air or the temperature rising 15 degrees in 1 minute or the temperature exceeds 135 degrees Fahrenheit.
If the sensor is near a source of smoke or steam such as a kitchen or bathroom, you will need to move the Smoke and Heat Sensor. If the sensor is near anything that affects a change in the temperature, such as a heating or AC vent or a door or window to the outside of the home, the Smoke and Heat Sensor will need to be moved.