My A/C has been screwing up pretty bad the last few days. I tried all the suggested tricks. so, I finally took it to the A/C repair shop and they said it was my expansion valve. The quote was $454. I searched for the part and it's $25. My question is, does anybody know the easiest way to change it? Or, does anybody have any suggestions on where I could get this information? Thanks for ALL HELP POSSIBLE!