This does not necessarily mean that heat pumps will stop working entirely, they will just become less and less energy efficient
Heat pumps are simply a popular and energy efficient means of heating and cooling a single’s home. There are more than 2 upsides to using heat pumps including the fact that they can both heat and cool a home. They also run exclusively on electricity, which means that if you have access to electricity, then you will consistently have a heated or cooled home. So, if heat pumps don’t require a fuel source for heating apart from just simple electricity, and you don’t have to worry about a gas leak, why on earth would you use any other form of heating or air conditioner? Well, heat pumps do not necessarily work efficiently in every type of weather conditions. In fact, the efficiency of more than 2 heat pumps will beginning to decline once the temperature goes below 40° F, then by the time the temperature dips below 30° the heat pump will not be able to work as efficiently, and it will consume more energy compared to the amount of heat it is putting out. The main reason for this is quite simple and you may have guessed it. Because heat pumps draw outdoor heat into the home, when it gets to be recognizably chilly outside, there is not enough heat to draw from the outdoors for the heat pump to work efficiently. This does not necessarily mean that heat pumps will stop working entirely, they will just become less and less energy efficient. That being said, there are more and more chilly weather conditions heat pump models that are able to remain efficient even at sub-zero temperatures, so this entire stigma against heat pumps is slowly starting to fade.