The clutch does not disengage on my air conditioning so the air conditioner works for 10 minutes and then the AC blows hot air. To disengage the clutch, I pulled out the LP wire and it disengaged. When I plugged it back, the LP engaged the clutch but it doesn't disengage like it is supposed to. Is the problem with the LP sensor, or what else could it be.

Have you checked the refrigerant? Mine was acting similar, and I went to AutoZone, got a can with a gauge and added until the pressure was corrct on the lpw side. Fixed it. Not going to replace the condenser yet. When one can won't make it through the summer, then we;ll look at doing that.

Speaking with an AC technician about what I should be watching on my car (S70) dirung maintenance he told me that at high millage he needs to disasemble the compressor clutch for a good clean up. He said that it is common to 850 type and described what you experience. May be somethings to consider.

Check the continuity of the LP switch. If it's still closed when the engine is shut off then the switch is bad.

I checked the continuity switch with the motor off using the tester and found that it has continuity. Is the switch bad or is this the way it is supposed to be? Could you please tell me more about this switch, because the clutch stays engaged while the a/c is running. It doesn't cycle. Thanks for your help.