Hello! Recently my air conditioning is causing problems, maybe someone can help me. If I start the engine and the climate is switched on in the ECC, the air conditioning compressor works as it should. It switches on and off, depending on the need. This only works for a few minutes, then it no longer switches on. If I then switch off the engine for a few minutes and then start it again, the compressor goes again for a while. If I let the engine run without having to e climate is switched on and then after a few minutes the climate is switched on, so the compressor does not switch on at all. I have already checked the following things: – error memory: no errors – magnetic coupling: That’s not the reason. Both after the broomstick method checked, as well as by measurement – no more switching signal for the coupling comes. – compressor relay: in order – refrigerant level: On the dryer leak traces of the contrast medium are visible. These could be seen from the change of the A too low refrigerant level would also be the first idea of the friendly Volvo master. He thinks this is expressed in exactly the symptom that the compressor is still on at the beginning and no longer on later. Ok, understandably. But why is the compressor no longer going after a few minutes of driving, even if it was not switched on before? Then it can’t be due to a too low refrigerant level, can it? In the workshop, we also briefly looked at the peripheral values of the air conditioning system working at this moment: Compressor switches at about 5 degrees evaporator temp. from time to time at about 9 degrees again. The refrigerant pressure moved between 4 and 7 bar. With warm engine and about 15 degrees in the workshop. Unfortunately, we could not wait until the compressor shuts down. Maybe one of you has an idea? Or maybe someone can explain to me why it is too g eringen refrigerant level can lie? Greeting Matze