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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 causes sewer smell in the house?
Sewer smell in the house is often caused by dry plumbing traps, which can allow sewer gases to escape into living spaces. Other potential sources include a blocked vent stack, broken sewer lines, or a malfunctioning septic system. Additionally, leaks in pipes or fixtures can contribute to unpleasant odors. Regular maintenance and inspection of plumbing systems can help prevent these issues.
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 can cause a sewer smell do come in your house after running water for a long period of time?
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.
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.
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.
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.
How sewer gas smell?
Awful.
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.
What causes sewer smell in the house?
Sewer smell in the house is often caused by dry plumbing traps, which can allow sewer gases to escape into living spaces. Other potential sources include a blocked vent stack, broken sewer lines, or a malfunctioning septic system. Additionally, leaks in pipes or fixtures can contribute to unpleasant odors. Regular maintenance and inspection of plumbing systems can help prevent these issues.
