A heat pump is a highly efficient air conditioning and heating system, all in one. Most heating systems, like furnaces and boilers, have to generate heat using natural gas or large amounts of electricity. Heat pumps use electricity, but they only have to move heat, rather than generating it. This results in much lower energy usage than comparable systems, especially if you purchase a high-efficiency heat pump.
However, like any system, a heat pump can run into trouble. One of the most alarming is when a heat pump just won’t heat! You might hear that the fan has turned on and the system appears to be running—so why don’t you feel any heat from the vents?