One of the nice features of heat pumps is that they easily switch between heating and cooling modes. You don’t need to make changes to the heat pump itself when you need warmth from it after months of cooling. All that has to happen is an adjustment on the thermostat, and the thermostat signals the heat pump to change modes. That’s a reason heat pumps in Tampa, FL are popular options: we can quickly leap to heating during the short periods when we need it, then go right back to cooling.
But a heat pump can malfunction like any other device, and you might find that when you need heat for your house that the heat pump is still working in air conditioning mode and sending cool air from the vents. Why is this happening?