If you have a late model Volvo and the Air Conditioning goes from ice cold to hot after driving for about 15 minutes. Then if the vehicle is allowed to cool off, the A/C goes back to cold again, we have your solution. On many late model Volvo's the Air Conditioning Compressor Clutch starts to fail after getting hot. To remedy this problem you have to replace the A/C Compressor with an updated unit, which include an update clutch assembly. We also recommend replacing the Air Conditioning Compressor Clutch Relay at the same time, because it may have been taxed during the clutch failure and is no longer reliable. This is not a "do-it-yourself" type job, unless you have an Air Conditioning Machine that can evacuate the Freon from the ... read more