Live in a trailer, not gas leak, not sewer backed up, but there is when heat or air on a foul like rotten egg smell, very annoying and frustrating, nothing works, almost affixiate myself with sprays and perfume.

Could it be a pipe leaking into one of the vents or the cold return not working
Totally in the dark.

Did this just start or has it been a ongoing thing? It only smells when the heat's on? Let me know, Tom

I was asked if the smell from air and heat just started by tom. No it has been here since I moved in
With air cond and the heat. It sucks and smells


It smells when air conditioning in the summer was on and now.

Let's start by checking the AC condensate drain. If it drains into a plumbing vent or drain you have found the cause of your smell. Let me know, n Tom

Hello Speedball.
Any advice you have would be great. I have the same intermittent rotten egg odor from my vents when A/C is on. Just had some guys out today that cleaned the coils, but half an hour later, it's back. I'm not sure if what they did would help with AC condensate drain. To quote the invoice: Chemically cleaned out both evap coil and condenser operation normal at time. Unable to pinpoint smell but believe coil cleaning and advised customer to close up drywall where return air is.

When you talk about vents do you mean AC vents or plumbing vents? I'll ask you the same question I asked Lorena.
et's start by checking the AC condensate drain. If it drains into a plumbing vent or drain you have found the cause of your smell. Sound like it's worth checking out?
Cheers, Tom