The answer to 'how much to replace thermostat' is that the cost to replace a thermostat can vary widely depending on several factors. As a general range, homeowners can expect to pay anywhere from $50 to $300 to have a new thermostat installed by a professional HVAC technician. The exact price will depend on the type of thermostat, the complexity of the installation, and your local labor rates.
More basic, manual thermostats are typically on the lower end of that range, while smart or programmable thermostats with advanced features can cost more. Additionally, if the thermostat requires rewiring or other complex installation work, that will also increase the overall cost. Getting multiple local quotes is essential to understanding the specific price for your home.