It is very important to clean your heaters filter 2 to 3 times a year. Locate where your filter is and you can either replace it or install a washable filter that is reusable. By doing this simple task it will make your furnace work more efficiently and will save you money. If your furnace is not working at top performance it can be deadly. It can produce carbon monoxide which is incomplete combustion. Every furnace produces a little carbon monoxide which is disposed of through the furnace’s venting system. A furnace that is clean and efficient will create a small amount of carbon monoxide, while a dirty and inefficient heater will produce deadly amounts. Since carbon monoxide is colorless and odorless it makes it that much more dangerous. The results of breathing in carbon monoxide will result in confusion, disorientation, flu like symptoms or death. This is why it is very important to have your furnace checked and cleaned on a yearly basis.
If your furnace is older it is even that much more important to have it serviced regularly. The new furnaces come with features that will shut down the system if a problem is detected where older furnaces do not have this feature. Another problem that occurs in older furnaces is the combustion chamber can develop small cracks in it that are not visible and will leak carbon monoxide into your house.