I have seen this where water has leaked into the ductwork and stagnated.
A sewer smell coming from your sink could be caused by a dried-out P-trap, a clog in the drain, or a problem with the sewer vent.
One of the biggest culprits I have found for sewer gas smell is the floor drain many floor drains are seldom if ever used and if unused long enough the water in the trap will evaporate allowing sewer gas to enter the dwelling. this also applies to any trap which is not used regularly.
Pour water in it. It could be the "p" trap has dryed up allowing sewer gases to come out.
A sewer smell in your house after running water for an extended period may be caused by a dry trap in your plumbing, which allows sewer gases to escape into your home. This can happen if fixtures or drains that are seldom used do not have enough water to keep the trap filled. Additionally, issues like a clogged vent stack or a broken sewer line can also lead to unpleasant odors. It's important to address these issues promptly to ensure proper drainage and sanitation.
A sewer.
Fleas may come out of the sewer seeking warmth, food, and shelter. Sewers provide a dark and damp environment that is conducive to flea survival and reproduction.
noon
December 31st 2009.
is is most certainly a blockage in the sewer line. Call a plumber to come and check it out and clean your sewer line for you.
You could be low on freon, also check your fuses to see if any are blown, or you culd have a bad a/c switch.
Come Clean Conditioner Kickstarter - 2013 was released on: USA: 11 January 2013 (internet)
That is condensation and it is normal for water to come out of an air conditioner in the back of it.