<p> The low temperature light will show when the temperature in the surrounding area is 18 degrees centigrade or lower.<br> <br> This happens because cooler air cannot be effectively dehumidified. Your machine may still work during this time but it will work much less effectively.<br> <br> It may be worth checking the filter is clear as this can affect the operation.<br> <br> Increase the heat in the area and the light will go off.</p>