I couldn’t find any discussion on this topic?
Heat pumps - I know we are not supposed to operate a heat pump in cooling mode when the outside tempertare is below 60-65 degrees…what about in heating? For example if the outside is above 80 degrees is it safe to test it in the heating mode or will it cause damage?
For gas or electric furnaces - For regular heating and cooling, is there a temperature range we should not go above or below when setting the thermostat?
Thanks in advance,