If your radiator is blocked, there are a few things you can do to try and unblock it. First, check to see if there is anything blocking the airflow to the radiator. If there is, remove it. Second, check the radiator for any debris or dirt that may be blocking the flow of air. If you find any, clean it off with a brush or vacuum cleaner. Finally, if your radiator is still blocked, you may need to call a professional to help you unblock it.