99 s70 ac system gone crazy
 

Greeting fellow Volvo owners
Well it's summer once again and AC problems show up .
A/C compressor disengages during acceleration from stop and at speeds above 2000 rpm, it kinda acts like when it gets to higher rpm pressure increases turns off compressor, will not re-engage clutch automatically, will only re-engage after turning it off manually on control panel, and bellow 2000 rpm, normal cruising speed. No issue at idle, gets cold like it should . Receiver/dryer new...
450k miles on compressor, previous issue compressor or system, would disengage only on right turn only, otherwise worked great. That's what prompted the new receiver/dryer .
Any help appreciated before buying new parts...

p.s. could somebody please tell me where is the expansion valve is ! 99 s70 base, front wheel drive.

I would suggest checking the high pressure switch for proper operation, and possibly re-shim the clutch on the compressor.