[Serge PETIT]

When I unplug the coil of the clutch it disengaged .
I am just back from my parking lot where I have made the tests .
Results are :
1) low pressure sensor disconnected ..........Clutch engaged and compressor running
2) high pressure sensor disconnected...........Clutch engaged and compressor running
3) HVAC relay in the engine compartement fuse case pulled out ........clutch disconnected and compressor off
4) Clutch coil disconnected ......................clutch not engaged and compressor off
5) Automatic Climate Control module on the dash:
- AC switch off (no light) clutch engaged and compressor on
- ACswitch on (light on) clutch engaged and compressor on
I think we may consider that the compressor clutch is fonctioning right .

All fuses for A/C are OK .
I have checked the automatic AC control module connector......nothing special or disconnected

I think that now I have to check the "freon" in the circuit because I am surprised by the fact that the dry/evaporator is covered with frost in one minute !
If "freon" is normal I think that I will have to change the HVAC control module because a componant may have failed (?) even if ventilation , defrost, air recycling and all contactors positions are fonctionning .........

At the moment it's not very hot in France (around 75 °F) and I have no long travel planed so I have disconnected the coil of the clutch and will reconnect if necessary .

Any new opinions/ suggestions ?

Thanks for for your help .