The answer to 'how much to replace thermostat in Illinois' is that the cost can vary widely depending on several factors. Typically, the cost to replace a thermostat in Illinois can range from $50 to $300 or more, depending on the type of thermostat, the complexity of the installation, and whether any additional wiring or HVAC system modifications are required.
Some key factors that influence the cost include the type of thermostat (basic manual vs. programmable or smart), the accessibility of the existing wiring, and whether the HVAC system needs to be reconfigured to accommodate the new thermostat. Labor costs can also vary based on the HVAC technician's experience and the local market rates in your area.