I read the other post on your site regarding fishy house odors. I am trying to figure out if our problem is due to recent maintenance or if it is an electrical or plumbing issue. Today our heating/air conditioning company did a routine inspection for us. Shortly after he left there was a very strong fishy odorous coming out of the intake vent. The smell goes away when the AC comes on.
I had the company come back out today because we have never had that smell before. The guy was able to smell the odorous and said he was able to smell it in the intake vents and in the air handler. He thinks it is s dead animal but if that is the case why have we never smelled it before and why is the smell occurring after he checked the unit?
I have gone around checking outlets, wires, etc. And nothing feels hot or smells. However, recently, on occassion when the A/c is not running we will hear a loud rumbling sound which sometimes causes the floor to vibrate. We can't locate where the sound is coming from but I have wondered if it is
the outside air unit. The sound is like a helicopter or motorcycle but it lasts for a couple of seconds. The man who came out today was unable to get that noise to occur.
Do you have any ideas of what could be going on and if the two issues are related?
I had a new heat/ac unit installed about three weeks ago. The day of the install, I smelled that exact fishy smell coming from one vent. It was horrible smelling! I didn't say anything at the time because the men were also replacing the duct work so I thought it must be something under the house. Once they got everything put back together and the system working, I didn't smell it again. Well, at least until a week ago. The smell came back, the weather warmed up so the system had not run for a couple of days. It seemed to go away again until yesterday. I finally googled the problem and found over and over that electrical issues were the cause. I called my sales rep and he sent someone out asap. As I told the tech about the smell, he suspected moisture in that one line of duct work but he was sure it wasn't electrical. To his surprise, the transformer installed along with the new components in my system was the culprit! He smelled the exact same thing in the same spot under the house. He replaced the transformer, checked every other vent and problem solved! He told me to be sure to call if I noticed anything like it again. I hope by now your problem is solved but if not, get them to check wiring!!
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