The cost to fix a bad thermostat can vary depending on the severity of the issue and the type of thermostat you have. On average, homeowners can expect to pay anywhere from $50 to $200 for thermostat repair. However, if the thermostat needs to be replaced entirely, the cost can range from $150 to $300. It's important to have a professional diagnose the issue to ensure the correct repair is made. At HVAC Alliance Expert, our specialists are trained to handle any thermostat repair or replacement needs you may have. Contact us today for reliable and affordable HVAC & AC services.