How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Charles Your Own Question
Charles, Engineering Contractor
Category: Plumbing
Satisfied Customers: 2066
Experience:  20+ years in most phases of construction
Type Your Plumbing Question Here...
Charles is online now
A new question is answered every 9 seconds

I have a bad sewage smell coming up through my vents. Do you

This answer was rated:

I have a bad sewage smell coming up through my vents. Do you know what might be the source and how to get rid of it?

Hello, and thanks for your question!


What vents is the smell located ?? plumbing?


The vents should be located outside the house. Is the smell coming from sinks, toilet's or drains ??


Thanks, Charles

Customer: replied 6 years ago.

The smell appeared when we first turned on the furnace and is coming through the registers inside the house. Some days it appears stronger than others. It doesn't appear to be coming from the sinks, toilets or drains, so I'm thinking it has something to do with the furnace. I does get really bad on some days.


Thanks, Sheila

Hello again,


If it appeared only after turning on the heating system then I dont thing its sewage.

You need to clean the duct work, I think you may have had a small animal that could have dies in the furnace or ducts.

I would have a ac/heating company come check the duct work and furnace. Its not uncommon for small animals and such nest in the duct work. They may not even be there any longer and smell is the old nest.

The other option is if you have floor registers, and small kids, Check them good as kids like to stick things in the registers.


I hope this answers your question, if so please click the green accept button. If not im still here to assist you.


Thanks again,


Charles and 2 other Plumbing Specialists are ready to help you

Related Plumbing Questions