Central Air conditioning SMELLS?

mtmt asked:


We had a new coil put in our central air last year. Before that, the smell from the AC became horrible, and apparently we had bacteria accumulating on the coil inside. It was so bad, even cleaning the coil didn’t work. So they replaced it. The air was fresh and clean. That was just last summer.
Well, today we are having a very warm day in the mid 70′s. We turned the air on, and it smells horrible AGAIN. This happened too on warm days in the fall. I told the technician, and he is trying to tell me my ducts need cleaned. BUT, the heat doesn’t smell at all, and we had the ducts cleaned a few years ago. They weren’t that bad, apparently, but they did find mold.
I have asthma, and can’t cough and sputter every time the AC is on this summer. Now we have to pay again for him to get the coil out and inspect it, I’m assuming. I don’t think this is fair – we just paid over a thousand dollars for the coil, which he said should last 8 plus years.
What could this be? Bacteria again? Will a UV light solve the problem, and, will we need yet another new coil?
What should he be checking when he comes? He seems to act like he has no clue. What am I suppose to do? Again, with asthma this is a really bad problem.
Thank you!

Dryer Vent Cleaning Northern Virginia
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