There are many components to your heating and cooling system. Have you ever thought of your carbon monoxide detector as being apart of your heating and cooling system? Well it does play a vital role that can save your life. If your furnace is emitting carbon monoxide through a cracked heat exchanger your carbon monoxide detector will be the first to warn you. Carbon Monoxide is an odorless, colorless and deadly. Changing your batteries annually will ensure that your carbon monoxide detector can do its job. You should also test your carbon monoxide detector to see if it is working properly. Annual furnace inspections will help prevent any dangers caused by your hvac system, especially a cracked heat exchanger which is common with older furnaces. When thinking of your to-do list, always remember to change all batteries( carbon monoxide, thermostat and smoke detector),change your filter often, have your air ducts cleaned annually and of course most importantly have your furnace and air conditioner inspected annually.