Hi - curious problem developed yesterday with our 2001 S40 2 litre UK bought Volvo that's currently running around in 35'C + heat in Spain.

When the air-con is switched on the engine idle speed rockets from the usual 700 - 1000 rpm up to between 2,500 - 3, 000 rpm. Turn the air-con off and the idle speed drops again! Bit frightening if you're driving with the air-con on, take your foot off the accelerator and the car doesn't slow.

Our nearest main dealer is 3 hour round trip away and they can't get the car in until 9.40am on 24 July. In the meantime they've suggested driving the car with air-con off and windows open!!!

Any ideas???