[amine0xff]

Hello
I have an issue with the AC in my BMW F30 with an N47 engine. The AC system starts up as expected, and the compressor clutch engages i can see it turning, but it blow cold air for minutes and stop and keep repeating . Also when outside temperature get hot .the ac not turn on at all.

Ps: I've already replaced the condenser, and nothing changes
Ps :the compressor clutch always engaged even when blowing hot air ..

[unicoil]

Is the system filled with correct quantity of coolant? Need to check HP and LP pressures with ac fill unit connected or with Ista the HP value of pressure sensor. Is the fan working with ac active? Is the ac compressor equipt with a electrical control valve? Are there any faults in Ista?

[amine0xff]

Is the system filled with correct quantity of coolant? Need to check HP and LP pressures with ac fill unit connected or with Ista the HP value of pressure sensor. Is the fan working with ac active? Is the ac compressor equipt with a electrical control valve? Are there any faults in Ista?

Thank you for replying.
Yes compressor is equipped with valve and clutch and I checked them .and also plug it directly with 12 volt
There no fault in ista .
And sensor reads is 8 to 10 bar depend on temperature.

[unicoil]

HP pressure is too low, it depends of outside temp. but should be approximatly 12-18 bar with compressor switced on. Could be a faulty/worn compressor. For diagnostic is LP value also important.