The thermostat on a 1997 Chrysler Sebring Convertible with a 2.5L V6 engine and electric fan is located
at the lower intake manifold. It's not easily accessible and usually requires removing some components to reach it. You'll likely need to remove various hoses, potentially the air intake, and possibly parts of the air conditioning system depending on the specific configuration of your car's engine compartment.
It's strongly recommended to consult a repair manual specific to your 1997 Chrysler Sebring 2.5L V6. A Haynes or Chilton manual will have detailed diagrams and instructions, showing exactly where the thermostat is located and the steps necessary for replacement. Attempting this repair without a proper manual and the right tools can lead to damage.