We have a horrible sewage smell coming from air vent in living room Its not the toilets as we have a clean out above ground and checked all the toilets. Its only in one vent in the living room.

We have a horrible sewage smell coming from air vent in living room Its not the toilets as we have a clean out above ground and checked all the toilets. Its only in one vent in the living room.


We have the same problem, its smells horrible, only when the air is on. We have had our coil unit replaced our ducts cleaned, still the smell is horrible. What in the world could it be.