My S80 T6 and Compressor Clutch

[beardog]

I have made it past the restoration of the major things and I am down to the AC now.
I checked the pressure on the AC low side and it was over 100psi. I did not ever get the clutch to engage at all by using the controls. I removed the relay under the hood and put a jumper in to bypass the relay. Voila, the clutch engages and the AC runs. A recheck ion the low pressure side, showed about 38psi. I examined the relay, and it does not appear to be defective, as I can energize it manually with a power supply. I saw te voltages change with the activity of the on/off of the control switch.
Although the clutch was engaged, it did not appear to produce very cold air.
Since I have had awesome advice on restoring this baby to a useable car again, and I LOVE IT! does anyone have any suggestions for me.
One other thing. I can turn the car off and remove the key with everything in place as normal, and the blower still runs. Is this normal?
any clues would be greatly appreciated.

[osman]

No thats not normal. You need to also be able to read the high pressure side to be able to diagnose the AC properly. Jumpers make a closed circuit open so your ECC unit is not sending the message to turn on the compressor. That or your pressure sensor.