Well, I thought I was being proactive s since our AC unit is 7 years old, I thought it woudl be a good idea to take advantage of one of those ads for AC service. DH changes the filter every month but no other maintence. The guy came out today and would not even do the $79 ceck up and cleaning. Said our coil is too dirty and the amount of dirt is more thn what is covered in the specal. Surprise surprise. He indicated it needed to be pulled out and washed with acid? Then he brought in the proce book and it woudl be just under $600. YIKES, with DD and I both not working, that is not possible. The AC works fine today but now he has me scared that it may stop working soon. Does anyone know if DH can pull the coil and clean it himself?