Oskar
A2OC Donor
Hi all
I have read a large number of posts on this excellent site, but cannot get to the nub of my problem. AUA petrol 2001.
Air con worked extremely well last summer. It has stopped being cold sometime over the last few months.
Current Situation
1- System is gassed and pressurised. Was fully serviced under a year ago, and is still under good pressure
2- I have no errors on VCDS lite (registered), and have never had any under HVAC or A/C related (except connection below).
3- I have not previously changed any sensors. The current compressor has unknown history, but has worked well since the A/C service
4- After some dash work, I have experienced intermittent connection errors between the HVAC controller and the instruments, engine and comfort (photos attached), however once the HVAC unit connectors are reseated, and the errors are cleared, all is well. I am reasonably sure these are just connector issues on the back of the HVAC controller (but happy to be informed otherwise). I have not had these errors for a while, and the non-cold remains.....
5- Radiator fan runs at all times. Replacement fan module installed (just because I had one) but no difference (as expected).
6- Radiator fan turns off when unit is in ECON mode. Interior fan changes tone markedly when ECON is on.
7- There is no 'weak cold' at start-up, or any sign of A/C working at all.
8- Using VCDS, all the Output tests appear to work as expected (flaps, heating etc)
9- I cannot access the hidden menu (Top and recirc buttons), but it appears this is normal for an A2.
10- First 18 measuring blocks are attached. Group 2 indicates compressor is ON (this shows 6 when ECON is pushed. When ECON is turned off, it flashes to 12 for less than a second, then back to 0).
Am I looking at a dodgy sensor, even though no codes suggest this, and if so, which one, or perhaps a N280 on the compressor?????
The answer may be in front of me, but I cannot see it, so hope one of you experienced folk and point me in the right direction.
Thanks
Matt
I have read a large number of posts on this excellent site, but cannot get to the nub of my problem. AUA petrol 2001.
Air con worked extremely well last summer. It has stopped being cold sometime over the last few months.
Current Situation
1- System is gassed and pressurised. Was fully serviced under a year ago, and is still under good pressure
2- I have no errors on VCDS lite (registered), and have never had any under HVAC or A/C related (except connection below).
3- I have not previously changed any sensors. The current compressor has unknown history, but has worked well since the A/C service
4- After some dash work, I have experienced intermittent connection errors between the HVAC controller and the instruments, engine and comfort (photos attached), however once the HVAC unit connectors are reseated, and the errors are cleared, all is well. I am reasonably sure these are just connector issues on the back of the HVAC controller (but happy to be informed otherwise). I have not had these errors for a while, and the non-cold remains.....
5- Radiator fan runs at all times. Replacement fan module installed (just because I had one) but no difference (as expected).
6- Radiator fan turns off when unit is in ECON mode. Interior fan changes tone markedly when ECON is on.
7- There is no 'weak cold' at start-up, or any sign of A/C working at all.
8- Using VCDS, all the Output tests appear to work as expected (flaps, heating etc)
9- I cannot access the hidden menu (Top and recirc buttons), but it appears this is normal for an A2.
10- First 18 measuring blocks are attached. Group 2 indicates compressor is ON (this shows 6 when ECON is pushed. When ECON is turned off, it flashes to 12 for less than a second, then back to 0).
Am I looking at a dodgy sensor, even though no codes suggest this, and if so, which one, or perhaps a N280 on the compressor?????
The answer may be in front of me, but I cannot see it, so hope one of you experienced folk and point me in the right direction.
Thanks
Matt