Check the A/c compressor clutch to see if it's spinning. When you had the a/c gauge connected and it showed 25psi was the a/c button engauged?? 25 psi on the low wouldnt be so bad if it was on and working. Sometimes on Accords the heater control cable goes out of adjustment or the knob breaks on the inside and the a/c works fine but the heater always stays on and you think the a/c doesn't work. I always check those items when inspecting a system....