Office Air Conditioning Office Air Conditioning Has A Urine/dead Rat Smell Coming Out Of It Every Time I Turn It On. How Do I Fix It?

Office air conditioning has a urine/dead rat smell coming out of it every time i turn it on. How do I fix it? - office air conditioning

We ask people who have installed and said that perhaps a dead rat in the sewer, but I can not get ... What the hell do I do? He is very bad, and the customers will find the smell ... HELP!