Gas Furnace Vent Pipe Blocked

The pressure switch can also be tripped by an obstructed exhaust flue gas vent pipe.

Gas furnace vent pipe blocked.

Depending on the type of furnace venting takes place through a plastic pipe on the outside of the house or through the chimney. To work properly a furnace needs adequate airflow. Moisture builds inside your furnace pipes when the air can t properly circulate and this can result in rust. Failure to ignite caused by clogged flue vent.

Gas furnaces build up scale which forms when gas byproducts and moisture combine and these can block the flue. One of the main jobs of vent pipes is to get rid of those nasty odors and gasses so if you smell something off it s time to check it out. If you see rust or water streaking on the vent flue or on your chimney something may be blocking the flue. Over time the furnace exhaust vent can become clogged with.

How to clean and clear furnace exhaust vents. Now let s look at the top signs to look for which may mean a vent is clogged. Strong sewage smells are a telltale sign that your toilet vent pipe may be clogged.