common problem, not easy to replace. entire dash has to come out. do yourself a favor and replace the evaporator while you're at it. i did mine several years ago.
seats, dash, console, steering, wiring......all have to come out.
just follow the repair manual, take lots of pics and label and bag everything, step by step. did it evenings and weekends and everything worked out perfectly.
some of the bolts are coated and are one-time use and have to be replaced. ordered all the parts from acura before i started and all went smoothly.