Hello gang, first off I live in South Louisiana. The weather is nice and warm here. I have an 07 RDX, 75k miles. 2 weeks ago I went in to work the AC was working flawlessly I mean icecold within seconds of turning the ignition on. I drove to lunch and when I got back in my RDX from lunch the AC was set to 67 and cranked up half way on the fan speed. It started blowing hot air. I got back to work did not see anything out of the ordinary. So I thought nothing about it. Later that day I got in to go home and it was blowing icecold again. A few days pass by and similar problem arises again and its been doing this now for almost 2 weeks. I had my oil changed and figured maybe I need a freon charge. The place said pressures were great and the unit was producing water and seemed to be working fine...of course that particular day it never blew hot air while at the service garage. Anyone have any advice would be greatly appreciated. I fear I will have to go to the dealership and the fix is gonna cost a bunch.

 

If it is blowing hot and cold on and off, it could also be a relay. I've had to replace mine twice on my TSX and had the same symptoms. It can get frustrating with the hot and cold variations. Luckily, the fix is relatively cheap (around $100 on the TSX).