In extreme cold weather, heat pumps may experience which of the following issues?

In extreme cold weather, heat pumps can struggle with extracting heat from the outside air due to a significant drop in temperature. Heat pumps operate by transferring heat from the outside air to the inside of a building, and their efficiency depends on the temperature difference between the indoor and outdoor environments. When temperatures fall dramatically, the amount of available thermal energy in the outside air decreases, making it increasingly difficult for the heat pump to capture sufficient heat for effective heating.

This challenge often necessitates auxiliary heating sources to achieve desired indoor temperatures, which can lead to increased energy consumption. Understanding this limitation helps in planning for adequate heating solutions during extreme weather conditions. The other options do not accurately describe the specific challenge that heat pumps face in extreme cold.