JSladen

No cutoff code, that stays at 0. And fans sounded like they were running, but I didn't check under the bonnet to see which ones were active. I was suspecting the flaps before, but now I've felt some cool from it, I think that is less likely.

@J.R.I'm fine with the Thread hijack, this is all useful information for anyone trying to look at their aircon. @Wino Yes, the car had been in the sun all day, so it's no surprise that the coolant temp was above ambient. For now, the car has had a regas, and we are now at 6.6bar steady state, rising to 10, then dropping to 7.6 bar when the engine is running and AC turned on. When driving you now get small intermittent blasts of cool. I'm ordering a replacement solenoid valve, which should be here next week, which I'll get fitted and see how much that improves things again.

There are 2 sets of reading side by side above, though looking at it on my phone it has mashed them together a bit. If I set it to desktop view it looks Ok. Watching with VCDS there is an immediate jump in pressure when the AC switch is turn on, and that gets up to about 8 bar before dropping off back down to about 6 bar. As I said, I will try and source and N280 and see how that goes.

Thank you very much for your replies. i will go on a hunt for that valve now. As far as I can tell, the sheer plate is ok. The bolt is rock solid, and the whole of the sheer plate spins smoothly with the engine running. The fact that some pressure is built would suggest to me that it is ok, and driving the internals of the compressor.

Is the modulating valve the n280 that's on the back of the compressor? Or should I be looking elsewhere? I've got a friendly garage who can vacuum it down if they know they're doing the refill later.

Hi, I have an Octavia MkII Estate, that has been sat doing not much over the lockdown period, and now I need to use it again the Aircon is not working. There are no errors from the HVAC system in VCDS, there is gas, and it does build some pressure (4 bar -> 6-8 bar), but what ever I do, all I get is hot air from the blower. I've done a couple of VCDS reads, and was wondering if anyone might have an idea what is going on with it? The first read was after it had been sat in the car park all day, so should be steady state. the second is 5 minutes later, with the engine running and the AC turned on. If anyone has any ideas of what might be up, or a good option to investigate, I would love it get your feedback. Many Thanks James Address 08: Auto HVAC (1Z0 907 044 R) Address 08: Auto HVAC (1Z0 907 044 R) 18:05:00 Group 001: General 18:11:05 Group 001: General 6.0 Compressor Shut-Off Code 0.0 Compressor Shut-Off Code 800 /min Engine Speed 800 /min Engine Speed 0.0 km/h Vehicle Speed 0.0 km/h Vehicle Speed 04:00 Standing Time 04:00 Standing Time 18:05:00 Group 002: Compressor 18:11:05 Group 002: Compressor 0.010 A Compressor Current (actual) 0.820 A Compressor Current (actual) 0.000 A Compressor Current (specified) 0.820 A Compressor Current (specified) 0 /min Compressor Rotations 1000 /min Compressor Rotations 0.0 Nm Compressor Load 1.9 Nm Compressor Load 18:05:00 Group 003 18:11:05 Group 003 4.0 bar Refrigerant Pressure 6.0 bar Refrigerant Pressure 9.6 % Radiator Fan Activation (actual) 9.6 % Radiator Fan Activation (actual) 0.0 % Radiator Fan Activation (spec.) 0.0 % Radiator Fan Activation (spec.) OFF Engine Speed (increase) ON Engine Speed (increase) 18:05:54 Group 004: Temperatures 18:11:11 Group 004: Temperatures 34.0°C Outside Temp. Unfiltered 34.0°C Outside Temp. Unfiltered 34.5°C Outside Temp. Regulation 34.0°C Outside Temp. Regulation - Fresh Air Intake Temperature - Fresh Air Intake Temperature 45.0°C Coolant Temperature 59.0°C Coolant Temperature 18:05:54 Group 005: Outlet/Footwell Blower Temperature 18:11:11 Group 005: Outlet/Footwell Blower Temperature 35.0°C Left Outlet Blower Temperature 39.0°C Left Outlet Blower Temperature 35.0°C Right Outlet Blower Temperature 37.0°C Right Outlet Blower Temperature 41.0°C Left Footwell Blower Temp. 39.0°C Left Footwell Blower Temp. 40.0°C Right Footwell Blower Temp. 38.0°C Right Footwell Blower Temp. 18:05:54 Group 006 18:11:11 Group 006 37.0°C Evaporator Temperature 38.0°C Evaporator Temperature 38.0°C Interior Temperature 37.0°C Interior Temperature 0.0 Left Sunlight Intensity (G107) 170.0 Left Sunlight Intensity (G107) 50.0 Right Sunlight Intensity (G134) 290.0 Right Sunlight Intensity (G134) 18:06:00 Group 007 18:11:17 Group 007 Turbine Voltage (actual) Turbine Voltage (actual) 3.80 V Turbine Voltage (specified) 4.60 V Turbine Voltage (specified) 8.4 % Turbine Load 16.8 % Turbine Load 14.30 V Voltage (Terminal 30) 14.30 V Voltage (Terminal 30) 18:06:08 Group 011: Air Recirculation Flap Control Motor (V113) / Potentiometer (G143) 18:11:23 Group 011: Air Recirculation Flap Control Motor (V113) / Potentiometer (G143) Potentiom. (G143) Current Value Potentiom. (G143) Current Value Potentiom. (G143) Specified Value Potentiom. (G143) Specified Value Min. Position (G143) (Lower Stop/Close) Min. Position (G143) (Lower Stop/Close) Max. Position (G143) (Upper Stop/Open) Max. Position (G143) (Upper Stop/Open) 18:06:08 Group 012: Left Temperature Flap Control Motor (V158) / Potentiometer (G220) 18:11:23 Group 012: Left Temperature Flap Control Motor (V158) / Potentiometer (G220) 28.0 Potentiom. (G220) Current Value 29.0 Potentiom. (G220) Current Value 29.0 Potentiom. (G220) Specified Value 29.0 Potentiom. (G220) Specified Value 29.0 Min. Position (G220) (Lower Stop/Close) 29.0 Min. Position (G220) (Lower Stop/Close) 220.0 Max. Position (G220) (Upper Stop/Open) 220.0 Max. Position (G220) (Upper Stop/Open) 18:06:17 Group 013: Right Temperature Flap Control Motor (V159) / Potentiometer (G221) 18:11:30 Group 013: Right Temperature Flap Control Motor (V159) / Potentiometer (G221) 32.0 Potentiom. (G221) Current Value 33.0 Potentiom. (G221) Current Value 33.0 Potentiom. (G221) Specified Value 33.0 Potentiom. (G221) Specified Value 33.0 Min. Position (G221) (Lower Stop/Close) 33.0 Min. Position (G221) (Lower Stop/Close) 223.0 Max. Position (G221) (Upper Stop/Open) 223.0 Max. Position (G221) (Upper Stop/Open) 18:06:17 Group 014: Center Flap Control Motor (V70) / Potentiometer (G112) 18:11:30 Group 014: Center Flap Control Motor (V70) / Potentiometer (G112) 220.0 Potentiom. (G112) Current Value 220.0 Potentiom. (G112) Current Value 220.0 Potentiom. (G112) Specified Value 220.0 Potentiom. (G112) Specified Value 231.0 Min. Position (G112) (Lower Stop/Close) 231.0 Min. Position (G112) (Lower Stop/Close) 26.0 Max. Position (G112) (Upper Stop/Open) 26.0 Max. Position (G112) (Upper Stop/Open) 18:06:17 Group 015: Defroster Flap Control Motor (V107) / Potentiometer (G135) 18:11:30 Group 015: Defroster Flap Control Motor (V107) / Potentiometer (G135) 33.0 Potentiom. (G135) Current Value 33.0 Potentiom. (G135) Current Value 33.0 Potentiom. (G135) Specified Value 33.0 Potentiom. (G135) Specified Value 223.0 Min. Position (G135) (Lower Stop/Close) 223.0 Min. Position (G135) (Lower Stop/Close) 33.0 Max. Position (G135) (Upper Stop/Open) 33.0 Max. Position (G135) (Upper Stop/Open) 18:06:50 Group 016: Air Flow Flap Control Motor (V71) / Potentiometer (G113) 18:11:37 Group 016: Air Flow Flap Control Motor (V71) / Potentiometer (G113) 115.0 Potentiom. (G113) Current Value 25.0 Potentiom. (G113) Current Value 115.0 Potentiom. (G113) Specified Value 25.0 Potentiom. (G113) Specified Value 231.0 Min. Position (G113) (Lower Stop/Close) 231.0 Min. Position (G113) (Lower Stop/Close) 25.0 Max. Position (G113) (Upper Stop/Open) 25.0 Max. Position (G113) (Upper Stop/Open) 18:06:50 Group 017 18:11:37 Group 017 3.0 Vehicle Derivate 3.0 Vehicle Derivate 0.0 Convertible Top Status 0.0 Convertible Top Status 18:06:58 Group 019 18:11:43 Group 019 1.0 (no units) 1.0 (no units) 0.0 (no units) 3.0 (no units) N/A N/A N/A N/A