I have a 02 V70 that is having a AC problem. On warm days 85 and above the AC will stop running for about 5 -10 minutes, and then it will start working properly. Some days this happens 2-3 times, other days it never happens at all. I replaced the evaporator temperature sensor yesterday, and it did not fix the problem. I also put two cans of freon in it with no change. So that is how it started. Now it is worse. The clutch on the compressor kicks on and off constantly. It would appear to be a low pressure switch issue/no freon. I put a meter on the lead going to the compressor and the 12 volts comes and goes constantly. So something in the computer is guiding this. Where should I start next. Thanks

 

Does it ever show 12 volts and the compressor is off?

 

No, when the compressor is off, there is not 12 volts

 

Maybe it is the evap temp sensor.