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It could be that the condesate drain line has been connected to the wastewater/blackwater stack. The trap (hopefully installed) preventing sewer gas from moving up the condensate line may have dried out. If dry, sewer gasses are no longer blocked by the hydraulic seal... resulting in a nasty smell when the unit is turned on and the fan kicks in.
Just a thought.
What else can I help you with?
What would cause a sewer smell from sinks and toilets when water is running?
Either you have a blockage present or your vents on your sewer lines have become blocked or you need to install more vents.
What is wrong after installing a sink and toilet in a basement you can smell sewer?
Sounds like the trap in the sink is getting the water pulled out of it. It probably wasn't vented properly.
Can you vent a sewer drain under a porch?
Only if you want to smell the fumes all the time. Code says it should be through the roof or above the edge of the roof.
How do you know the air conditioner is going out?
you can either check that there is a smell if there is a liquid bottle in your air freshner than see if there is any liquid left
Can you be getting a sewer smell when you start a fire in the fireplace sounds crazy but when you start a fire and it begins to draw you can smell sewer?
Yes, my brother's house in CT. has the same issue and the cause is still undetermined. I initially thought that the house was so tight, that the fireplace "draw" was pulling the gas right thru the traps. That does not appear to be the case as the smell doesn't appear to be coming from the sink. He doesn't know of any vent inside the house, that could explain this. I'm going to suggest that he crack a door or window in the family room and see if that short circuits the draft and has any effect.
What causes sewer smell come from the air conditioner vent?
I have seen this where water has leaked into the ductwork and stagnated.
What could be causing the sewer smell outside my house?
Several potential causes could be contributing to the sewer smell outside your house, such as a blockage in the sewer line, a damaged sewer pipe, or a problem with the sewer vent. It is recommended to contact a professional plumber to inspect and address the issue promptly.
What are causes of an oil smell from a wall air conditioner?
Coils and filter need cleaning.
What causes a sewer smell in the bathroom and how can it be resolved?
A sewer smell in the bathroom is usually caused by a dried-out P-trap, which is a curved pipe that prevents sewer gases from entering the room. To resolve this issue, pour water down the drain to refill the P-trap and block the odor. Additionally, check for any leaks or blockages in the plumbing system that may be causing the smell.
What are the possible causes of a sewage smell coming from the bathroom sink?
Possible causes of a sewage smell coming from the bathroom sink include a dried-out P-trap, a clog in the drain, or a problem with the sewer venting system.
What are the possible causes of a sewer smell in the laundry room and how can it be resolved?
A sewer smell in the laundry room can be caused by a dried-out P-trap, clogged drain, or a damaged sewer line. To resolve it, try pouring water down the drain to refill the P-trap, clean the drain with a mixture of vinegar and baking soda, or call a plumber to inspect and repair any damaged sewer lines.
What causes a rotten egg smell not sewer in the bathroom but not in other bathroom on same floor?
Change the wax seal under the toilet
What could be causing a sewer smell to come from my sink?
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.
How sewer gas smell?
Awful.
What is wrong with my car?
It could have a blown gasket which causes that smell. And there could be something loose in the interior of the air conditioner.
Why does car air conditioner smell like sewer?
A car air conditioner may smell like sewer due to mold or mildew growth in the evaporator core or drain pan, where moisture can accumulate. This stagnant water can create a breeding ground for bacteria, leading to unpleasant odors. Additionally, a clogged drain line can trap water, exacerbating the problem. Regular maintenance, including cleaning the system and using a disinfectant, can help prevent these smells.
Why is there a sewer smell in my house after rain?
The sewer smell in your house after rain may be due to a backup or blockage in your plumbing system, which can cause sewer gases to escape into your home. The rainwater may also be causing the sewer lines to become overloaded, leading to the smell. It is important to address this issue promptly to prevent any potential health hazards.
