Revs dont increase when air con is switched on

Recently my engine stopped revving up a little when I turn the air con on. Now when I turn the air con on the revs drop a bit.

Is there a vacuum line that triggers the revs going up? or is it run by a relay or something?


I guess noone knows??

how many km’s are on your engine?

How does this relate to the question though?

no vacuum line. the electronic signal tpo turn on the compressor also send s a signal to the IAC to turn up the idle

hmm so my problem could be more serious than I thought? could it be a relay switch gone? if so, which ones do I need to check?? Thnx