I'm a bit stumped, as the AC in my wife's car is refusing to blow cold air. Can you guys help?
Current situation:
- Compressor & dryer changed in 2015 acc. to the service book. There is a minimal amount of axial play on the compressor pulley, and the pulley center and the pulley itself rotate together, so I gather the compressor should be good. The electrical connector on the back is secure, but the bit it attaches to feels lose on the compressor body. Is this normal?
- No fault codes. The only code I had was from th G263 sensor, which I changed and the code cleared with VCDS.
- The system shows an absolute pressure of 6,5-7,5 bar when looking at measuring blocks on VCDS. However, hooked up to an external meter there is no actual pressure in the system.
- The system was re-charged yesterday with 500g of fluid and the appropriate amount of oil. Only 100g of fluid and 2g of oil came out, so could it be that the compressor's been running dry and is toast? No leaks detected with the vacuum test.
- The measuring blocks in VCDS show ON when AUTO is pressed, and OFF when ECON is pressed
- Air circulation flaps work fine, VCDS output test goes through without errors
- If I remove the connector on the AC radiator at the front, I get a code from the G65 sensor as I should. However, this doesn't affect the pressure reading in VCDS, so is there another pressure sensor somewhere?
My guess is either a bad pressure sensor, which is telling the car the pressure is rather high when it's not, and thus the compressor is running in free-circulation mode. As I understand, it's an always on type affair, and the climatronic only controls a valve in the system or the coolant fluid. Either that or the compressor is toast.
Current situation:
- Compressor & dryer changed in 2015 acc. to the service book. There is a minimal amount of axial play on the compressor pulley, and the pulley center and the pulley itself rotate together, so I gather the compressor should be good. The electrical connector on the back is secure, but the bit it attaches to feels lose on the compressor body. Is this normal?
- No fault codes. The only code I had was from th G263 sensor, which I changed and the code cleared with VCDS.
- The system shows an absolute pressure of 6,5-7,5 bar when looking at measuring blocks on VCDS. However, hooked up to an external meter there is no actual pressure in the system.
- The system was re-charged yesterday with 500g of fluid and the appropriate amount of oil. Only 100g of fluid and 2g of oil came out, so could it be that the compressor's been running dry and is toast? No leaks detected with the vacuum test.
- The measuring blocks in VCDS show ON when AUTO is pressed, and OFF when ECON is pressed
- Air circulation flaps work fine, VCDS output test goes through without errors
- If I remove the connector on the AC radiator at the front, I get a code from the G65 sensor as I should. However, this doesn't affect the pressure reading in VCDS, so is there another pressure sensor somewhere?
My guess is either a bad pressure sensor, which is telling the car the pressure is rather high when it's not, and thus the compressor is running in free-circulation mode. As I understand, it's an always on type affair, and the climatronic only controls a valve in the system or the coolant fluid. Either that or the compressor is toast.