I had what appear to be the same symptoms in my 2003 CRV.
Found the following answer, and will pursue it and test it.
The first link is to some pictures of the repair job (for forum members)
Second link is the whole thread. written by JohnnySanrey and BugJug
I am inclined to buy the $50 module and not go on the cheap to replace the actual electronic components inside it.. Hope this helps
2003 CR-V A/C problems! - Page 2 - HondaSUV Forums - Discussion forum and bulletin board for Honda CR-V, CRV, Element, Pilot, HR-V owners
A/C fan not working - HondaSUV Forums - Discussion forum and bulletin board for Honda CR-V, CRV, Element, Pilot, HR-V owners