We live in a 5 YO home in Georgia. It's a 1 1/2 story all brick with a crawl space and upstairs and downstairs HVAC systems. 2 years ago, we discovered that our condenser coil, reversing valve, etc. had been installed incorrectly so our downstairs Trane system was not working properly. As a result, the AC and heat didn't work correctly and there was a lot of humidity in the summer. We wound up getting those issues resolved and all seemed OK. In Dec. of 2006, we had an especially wet fall/winter. We began to notice a horrible smell coming out of the system when it was cold outside and it was raining. Through all of our AC system checks, we found a leak had formed in our crawl space and water had seeped in under the vapor barrier. We had the crawl space issues fixed, all the vapor barrier pulled out and replaces, and had the AC evap. coil cleaned and the ducts checked and cleaned. The smell/DSS lingered on but eventually went away once the weather changed. We had the coil cleaned again just for safe measure and hoped that all would be OK. Well, this winter, on Xmas day to be exact, the problem popped back up again. We wound up getting the coil cleaned again and I also added an industrial sized crawl space dehumidifier just for good measure. However, it didn't help. After talking with Trane corp. and Trane of GA, we were told that we needed the replacement, sealed coil. We just had that put in last week and the drain pan cleaned, etc. for good measure. Of course, we had a lot of rain over the weekend and the smell is still lingering and the air blowing from the vents seems more humid than normal-in other words, nothing's changed.
My question now is, could the lingering problem with dirty sock (it's far worse than sock odor-it's really, really bad) have anything to do with the condensing unit issue we had addressed previously? We didn't have any issues with smell from the system prior to the replacement. It's my understanding that the condensing unit exchanges heat and humidity from the inside to the outside. If it wasn't working correctly, could it be contributing to my problem? Also, since we've done the replacement coil and it hasn't seemed like it's helped, what is the most logical course of action? I've heard the talk about UV lights, etc. Does that stuff really work. Should I waste my time with them or look at replacing equipment?
This dirty sock problem was bad enough before when it was just my wife and I. Now that we have a baby in the house, we're especially concerned with air quality.
Sorry for the long post. Thanks in advance for any advice.