Verify that your heat pump thermostat wiring is properly attached, according to the wiring diagram. “Make sure the wires are tight and all the way in the new thermostat,” Sherman says.

How much does a heat pump cost? Heat pumps are more expensive than traditional AC/furnace systems. The cost of a heat pump can also depend on the type of heat pump and the size of the house. In ...

For ductless heat pumps, the most popular in Minneapolis, it's $6,000 to $7,000 per house zone, while forced air heat pumps cost between $10,000 to $20,000, depending on the model.