I had a new a/c installed about a month ago. Before we went on vacation and since we've been home, it has a smell to it. I live in a mobile home. The smell is not there when nothing is running, when the furnace is on, when the evap cooler is on. I can't smell it outside the mobile, in the crawl space. I've stuck my head down the return vents and can't smell it there either. It's only when the a/c is running & then the front half of the house smells. What could it be? Does R22 smell? It smells like poop to me.
