The answer to 'how much to replace thermostat in Chicago' is that the cost can vary significantly depending on several factors. As an HVAC expert, I can provide some general guidance on the typical range and what influences the pricing.
Replacing a thermostat in the Chicago area can generally cost anywhere from $100 to $300 or more. The exact price will depend on the type of thermostat, the complexity of the installation, labor rates in your local area, and whether any additional HVAC system work is required. It's important to get quotes from local HVAC contractors to get an accurate estimate for your specific situation.