Greetings!





2006 Accord 78K miles. 2 days ago the AC was working fine on a 2 hour highway drive. Then yesterday, I turn it on and it is not getting cold. Just blowing warm air.





What I have done:





The A/C Compressor Clutch does turn on and off when I switch AC to on.


I am getting Warm air blowing, so I think the blower is working





I checked the Relays, switched them around and the Clutch and Blower both work.


There is nothing obstructing the Front radiator.





I took some pics of the AC line. The one marked with an H was a bit dirty. I noticed when I unscrewed it it was not tight. Some oil in the cap by the O-ring. The low side was clean and dry. As far as I can see the coolant pipes fittings are clean.





See photos.





So, how can I check the refrigerant? I watched a video and they said there is a Coolant pressure switch. And that if there isn't enough pressure the compressor would not come on?





Any suggestions would be appreciated.





Max Webber