Clogged Chimneys are pretty much a common occurrences when the older atmospheric furnace and boilers are used. Such as Standard furnaces and boilers whereas the flue gases vent with steel pipe to the chimney. We’ve seen an uptick of collapsing chimneys in the past few years.
Does anybody want to know why? I’ll explain, As the government continues the growing calls for more efficient furnace and boilers to cut down on fossil fuel usage. The newer boiler and furnaces no longer use standing piloted systems.
The majority of all new furnace and boilers have ignition systems. These ignition systems ignites the fossil fuel whether its natural gas or propane during the requirement of heat. The requirement of heat is provided by the thermostat.
Common causes for clogged chimneys are when the internal liners of the clay tiles or bricks shales off. Eventually the brick and shale builds up at the bottom of the chimney and continues upwards until you have a blocked chimney issue.
Symptoms of a clog in the chimney are: Beeping or alarming carbon monoxide detector. Carbon monoxide is a killer, pay attention! Carbon build up such as Black soot on or around burners and burner surface area of the furnace or boiler.
Furnace or boiler burners shutting down after a few minutes of operation.
Now there are other causes that mimic that same symptom such as; clogged furnace filter, actual cracks in heat exchanger or boiler block.
Clogged or defective pressure switches if applicable, defective limit switch as well as a failing flame sensor if applicable.
Pay attention to your chimney by inspecting the exterior portion of the chimney. Any of the above