The answer to 'how much to replace heat pump in Chicago' is that the cost to replace a heat pump in the Chicago area can vary significantly depending on several factors. In general, you can expect to pay between $4,000 to $10,000 for a full heat pump replacement, including the unit, installation, and any necessary ductwork or electrical work.
The exact cost will depend on the size and efficiency of the new heat pump, the complexity of the installation, the brand and model you choose, and whether you need to upgrade or replace any supporting components like the thermostat or air handler. It's important to get quotes from multiple HVAC contractors in your local area, as labor rates and material costs can vary.